Hearty Quinoa Broccoli and Cheese Bake

Introducing your new favorite vegetarian meal: our incredibly flavorful and satisfying Quinoa Broccoli and Cheese Casserole! This recipe is a true game-changer for anyone seeking a wholesome, high-protein dinner that’s both simple to prepare and absolutely delicious. Crafted with everyday ingredients, each generous serving boasts an impressive 35 grams of protein, all without any meat. It’s the perfect solution for busy weeknights when you desire something nutritious, comforting, and effortless. Forget complicated cooking; this casserole is designed for maximum flavor with minimal fuss, making it a staple in countless kitchens.

Why This Quinoa Broccoli Casserole is a Weeknight Winner

We’ve taken the beloved classic broccoli and cheese casserole and elevated it with a healthier, more protein-packed twist. Our version incorporates nutritious quinoa and a crunchy hemp heart breadcrumb topping, significantly boosting its nutritional profile without sacrificing any of that irresistible cheesy goodness. Many agree this modern take surpasses the original, offering a rich, comforting flavor alongside its impressive 35g of protein per serving.

If you’re worried that adding quinoa might complicate things or extend prep time, think again! The beauty of this recipe lies in its simplicity. You’ll actually bake the uncooked quinoa directly in the casserole dish, eliminating extra steps and keeping your kitchen mess to a minimum. From start to finish, this hearty meal is ready in just about 60 minutes. And the best part? It reheats beautifully, making it an ideal candidate for healthy meal prep throughout the week. Enjoy the convenience of delicious, nutritious leftovers that taste just as good the next day.

Key Ingredients for a Perfectly Balanced Casserole

The magic of this casserole comes from a blend of simple, wholesome ingredients that work together to create a symphony of flavors and textures. Here’s a closer look at what makes this dish so special:

• Quinoa: This ancient grain is a complete protein, meaning it contains all nine essential amino acids. It adds a wonderful nutty flavor and a satisfying texture, absorbing the cheesy liquid as it bakes to perfection. Its high fiber content also contributes to a feeling of fullness.
• Broccoli Florets: Packed with vitamins C and K, fiber, and antioxidants, broccoli is a nutritional powerhouse. When baked in the casserole, it becomes tender yet retains a slight bite, offering a fresh contrast to the rich cheese sauce.
• Sharp White Cheddar Cheese: The heart of any great casserole! Using freshly grated sharp white cheddar ensures a superior melt and a robust, tangy flavor that elevates the entire dish. It provides that classic comfort food taste we all crave.
• Aromatic Foundation: Diced yellow onion and minced garlic create a fragrant base, adding depth and warmth to the cheese sauce. These humble ingredients are essential for building a complex flavor profile.
• Milk and Vegetable Broth: These liquids form the creamy base of our casserole, ensuring the quinoa cooks evenly and the broccoli stays moist. Using 2% milk provides richness without excessive fat, while vegetable broth infuses an extra layer of savory flavor.
• Hemp Hearts & Panko Breadcrumbs: This dynamic duo creates an incredibly irresistible crunchy topping. Hemp hearts add healthy fats and extra protein, while panko breadcrumbs deliver an airy, crispy texture that beautifully complements the creamy interior.

Easy Swaps for Every Dietary Need and Preference

One of the best features of this quinoa broccoli and cheese casserole is its incredible adaptability. Feel free to customize it based on your dietary requirements or what you have on hand. Here are some fantastic alternatives and additions:

• For a Vegan Version: Easily transform this into a plant-based delight! Substitute the dairy milk with your favorite non-dairy milk (unsweetened almond or soy milk works wonderfully), swap conventional cheddar cheese for a high-quality vegan cheddar alternative, and ensure you’re using vegetable stock. For an extra boost of vegan protein, consider mixing in crumbled firm tofu, tempeh, or even chickpeas.
• Boost Your Animal Protein: If you’re not strictly vegetarian and want to add more animal protein, this casserole is very accommodating. Simply toss in some pre-cooked, shredded chicken (leftover Instant Pot shredded chicken is perfect), cooked ground turkey, or even cooked shrimp during the assembly phase.
• More Veggies, More Flavor: Don’t hesitate to increase the vegetable content! This casserole is a fantastic vehicle for sneaking in extra nutrients. Try adding sliced mushrooms, finely diced carrots, bell peppers, spinach, or even cauliflower florets. Just be sure to chop them to a similar size as the broccoli for even cooking.
• Alternative Grains & Bases: Quinoa is an excellent choice for its protein and fiber, but if it’s not available or not your preference, other grains or vegetables can work. Brown rice is a hearty alternative; just remember it might require a slightly longer baking time or pre-cooking. For a lower-carb option, chopped cauliflower rice can be a great substitute, though it will alter the texture and moisture content, so adjust liquids accordingly.

Troubleshooting: What if My Casserole is Too Liquidy?

While this recipe is designed for optimal moisture and texture, slight variations in ingredients or oven temperatures can sometimes lead to a casserole that’s a bit too liquidy. If you find your casserole has excess liquid at the end of the initial cooking time, don’t fret! Simply continue baking for an additional 10-15 minutes, uncovered, allowing more liquid to evaporate and the quinoa to absorb further. If you’ve already added the top layer of cheese, loosely cover the casserole with aluminum foil to prevent it from burning while it continues to bake. Alternatively, a simple trick is to let the casserole sit undisturbed for at least 10 minutes after removing it from the oven. This resting period allows the quinoa to naturally absorb any remaining liquid, resulting in a perfectly set and creamy texture. Every oven is a little different, so trust your instincts and adjust baking times as needed.

Storing and Prepping Your Quinoa Broccoli Casserole

This casserole is a dream for meal prep, holding up beautifully for several days. Store any leftovers in an airtight container or simply cover the entire casserole dish with foil or plastic wrap. It will stay fresh in the refrigerator for up to 4 days, making it perfect for grab-and-go lunches or quick dinners throughout the week.

Can I Make This Dish Ahead of Time?

Absolutely! This casserole is an excellent choice for meal prepping or when you need to feed a crowd. There are two convenient ways to prepare it in advance:

1. Assemble and Refrigerate: Follow all the recipe instructions for assembling the casserole, but do not bake it. Once assembled, cover the dish tightly with plastic wrap and refrigerate for up to 24 hours. When you’re ready to bake, remove it from the fridge and let it sit at room temperature for about 30 minutes to take the chill off before baking as usual. This helps ensure even cooking.
2. Bake and Reheat: You can also bake the entire casserole a day or two before you plan to serve it. Simply let it cool completely after baking, then cover and refrigerate. Reheat using the oven method described below for best results.

How Do I Reheat Leftover Casserole?

Enjoying leftovers is easy with these simple reheating methods:

1. Oven Method (Recommended for Best Texture): Preheat your oven to 350°F (175°C). Place the casserole (covered with foil or a lid to prevent drying) directly in the dish you stored it in. Reheat for 20-25 minutes, or until thoroughly warmed through. If the casserole appears a bit dry, you can add a tablespoon or two of vegetable broth or milk before reheating to restore moisture.
2. Microwave Method (For Single Servings): For quick, individual portions, place a serving in a microwave-safe dish. Reheat, uncovered, on medium power for 1-2 minutes, or until hot. Stir halfway through for even heating.

Delicious Serving Suggestions

While this Quinoa Broccoli and Cheese Casserole is hearty and satisfying enough to be a complete meal on its own, pairing it with a simple side can elevate your dining experience. Here are some ideas:

• For an Animal Protein Boost: If you’re looking to add more animal protein, this casserole pairs wonderfully with lean options. Consider serving it alongside juicy baked chicken breast, a succulent spatchcock chicken, or even convenient store-bought rotisserie chicken. Grilled fish or pork tenderloin would also make excellent companions.
• More Vibrant Veggies: To incorporate even more fresh vegetables, serve your casserole with a light and refreshing side salad. A crisp arugula salad with a lemon vinaigrette or a colorful spring mix salad provides a lovely contrast to the creamy casserole. Roasted asparagus, green beans, or a simple steamed vegetable medley are also fantastic choices.
• Hearty Sides: For a more substantial meal, consider pairing with a side of crusty whole-grain bread to soak up any extra cheesy goodness, or a scoop of fluffy brown rice if you’re looking to vary your grains.

Quinoa Broccoli and Cheese Casserole

Packed with protein and made with just simple ingredients, this quinoa broccoli and cheese casserole is the perfect vegetarian dish for busy weeknights.

By:
Lee Funke

Prep Time:
15 minutes

Cook Time:
50 minutes

Total Time:
1 hour 5 minutes

Servings:
4

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Ingredients

• 1.5 cups quinoa, uncooked
• 1/2 large yellow onion, diced
• 6 cups chopped broccoli florets
• 2 teaspoons olive oil
• 3 cloves garlic, minced
• 1 cup vegetable broth
• 1.5 cups 2% milk, or any kind of milk
• 6 oz. sharp white cheddar cheese, freshly grated
• 1/2 teaspoon sea salt

Topping

• ¼ cup hemp hearts
• 3 tablespoons panko bread crumbs
• 2 oz. sharp white cheddar cheese freshly grated
• 1 teaspoon olive oil

Instructions

1. Preheat oven to 375ºF (190°C) and generously spray a casserole dish with olive oil to prevent sticking.
2. Evenly spread the uncooked quinoa, diced onion, and chopped broccoli florets across the bottom of your prepared casserole dish. This forms the foundational layer of your delicious meal. Set the dish aside for now.
   
3. In a medium saucepan, heat 2 teaspoons of olive oil over medium-high heat. Add the minced garlic and sauté for about 30 seconds until fragrant, being careful not to burn it. Then, pour in the milk, vegetable broth, and add the sea salt. Gently whisk the mixture until the liquid is hot and steaming, but not boiling.
   
4. Remove the saucepan from the heat. Gradually add 6 oz. of the freshly grated sharp white cheddar cheese to the hot liquid, whisking continuously until the cheese is completely melted and smoothly incorporated into a creamy sauce.
   
5. Carefully pour the rich, cheesy liquid over the quinoa, onion, and broccoli mixture in the casserole dish. Use a spoon or spatula to stir everything gently, ensuring all ingredients are well combined and the quinoa is submerged in the liquid.
   
6. Cover the casserole dish tightly with aluminum foil and place it in the preheated oven. Bake for 30 minutes. After 30 minutes, carefully remove it from the oven (keeping it covered) and give the contents a good stir to ensure even cooking and prevent the quinoa from sticking.
7. Return the casserole dish to the oven, this time uncovered. Continue baking for an additional 20 minutes, or until the quinoa is tender and most of the liquid has been absorbed.
   
8. While the casserole is baking uncovered, prepare the delicious topping. In a small bowl, combine the hemp hearts, panko bread crumbs, 2 oz. of freshly grated sharp white cheddar cheese, and 1 teaspoon of olive oil. Mix these ingredients thoroughly until a crumbly texture forms.
9. Once the casserole has baked for the additional 20 minutes (uncovered), carefully remove it from the oven. Evenly spread the prepared crumb topping over the entire surface of the casserole. Return the dish to the oven and broil for 2-4 minutes, keeping a close eye on it, until the topping turns beautifully golden brown and crispy.
10. Remove the casserole from the oven and allow it to rest for 5 minutes before serving. This brief resting period is crucial as it allows the flavors to meld and the casserole to set, ensuring a perfect scoop every time.
    

Tips & Notes for Success

• This recipe was updated in January 2025 to enhance its flavor and nutritional profile.
• Any color of quinoa (white, red, or black) will work beautifully in this recipe. Choose your favorite!
• We recommend 2% dairy milk for its creamy texture and mild flavor, but feel free to use any unflavored milk you prefer, including whole milk or a non-dairy alternative like unsweetened almond or soy milk for a slightly different taste and consistency.
• For the best cheesy flavor and melt, we highly recommend grating your own sharp white cheddar cheese from a block rather than using pre-shredded varieties, which often contain anti-caking agents.
• Remember that making significant changes to the liquid-to-grain ratio or baking temperatures may alter the final outcome of the casserole. For optimal results, stick closely to the recipe.
• To ensure your casserole develops a perfectly golden and crispy topping, keep a close watch during the broiling stage, as broilers can vary greatly in intensity.

Watch How to Make It

Nutrition Information (per serving)

Calories:
685 kcal

,

Carbohydrates:
65 g

,

Protein:
35 g

,

Fat:
33 g

,

Fiber:
9 g

,

Sugar:
8 g

Nutrition information is automatically calculated and should only be used as an approximation. Actual values may vary based on ingredients and preparation methods.

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