Are you craving a hearty, comforting dish that’s both nutritious and delicious? Look no further! This Pizza Quinoa Casserole (Vegan!) is the perfect solution for a wholesome dinner that satisfies your pizza cravings without the guilt. Packed with protein-rich quinoa, vibrant veggies, and a melty vegan cheese top, this casserole is sure to become a family favorite. Let’s dive into the details of this delightful dish that is easy to prepare and bursting with flavor.
Why This Recipe Is Reliable

This Pizza Quinoa Casserole (Vegan!) is not only simple to make, but it also brings a medley of flavors and textures that will impress even the pickiest eaters. The combination of quinoa and vegetables provides a well-rounded meal, while the addition of vegan mozzarella gives you that cheesy satisfaction you desire. Moreover, this recipe is versatile; you can tweak the ingredients based on what you have on hand, making it a reliable go-to for busy weeknights.
What’s in the Bowl
Let’s take a look at the wholesome ingredients that make this casserole a must-try:
- 1 cup white quinoa (uncooked) – The base of our casserole, rich in protein and fiber.
- 1 yellow onion – Adds a sweet, aromatic flavor.
- 1 green bell pepper – Provides crunch and a fresh taste.
- 8 oz. mushrooms – Earthy and savory, they elevate the overall flavor.
- 4 cloves garlic – For that irresistible aroma and depth of flavor.
- 1 cup fresh baby spinach – A nutrient-packed addition that wilts beautifully.
- 3 roma tomatoes – Juicy and vibrant, they add freshness to the dish.
- 15 oz. can tomato sauce – The saucy base that ties everything together.
- 3/4 cup vegan mozzarella shreds – For that gooey, cheesy finish.
- 2 tsp. Italian seasoning – A blend of herbs that brings a classic pizza flavor.
- 2 Tbsp. fresh basil (for serving) – A fragrant garnish that elevates the dish.
Appliances & Accessories
Before you start whipping up this delicious casserole, make sure you have the following appliances and accessories on hand:
- Medium saucepan – To cook the quinoa.
- Large skillet – Perfect for sautéing the vegetables.
- Baking dish – To assemble and bake your casserole.
- Spatula – For mixing and spreading ingredients.
- Measuring cups and spoons – To ensure accurate ingredient portions.
- Knife and cutting board – For chopping vegetables smoothly.
Pizza Quinoa Casserole (Vegan!) — Do This Next

Ready to get cooking? Follow these simple steps to create your Pizza Quinoa Casserole (Vegan!):
Step 1: Cook the Quinoa
Rinse 1 cup of white quinoa under cold water. In a medium saucepan, combine the rinsed quinoa with 2 cups of water. Bring to a boil, then reduce the heat to low, cover, and let it simmer for about 15 minutes or until all the water is absorbed. Fluff with a fork and set aside.
Step 2: Sauté the Vegetables
In a large skillet, heat a drizzle of olive oil over medium heat. Add the diced yellow onion and sauté until translucent, about 3-4 minutes. Then add the chopped green bell pepper, sliced mushrooms, and minced garlic. Cook for an additional 5-7 minutes, stirring occasionally, until the mushrooms are tender and the mixture is fragrant.
Step 3: Mix It All Together
Add the cooked quinoa to the skillet with the sautéed vegetables. Stir in the fresh baby spinach, diced roma tomatoes, tomato sauce, Italian seasoning, and half of the vegan mozzarella shreds. Mix thoroughly until everything is well combined.
Step 4: Assemble the Casserole
Preheat your oven to 375°F (190°C). Transfer the quinoa mixture to a baking dish, spreading it evenly. Top with the remaining vegan mozzarella shreds.
Step 5: Bake
Bake in the preheated oven for about 25-30 minutes, or until the cheese is melted and bubbly. Remove from the oven and let it cool for a few minutes before serving.
Step 6: Serve and Enjoy
Garnish your Pizza Quinoa Casserole (Vegan!) with fresh basil before serving. Dig in and enjoy the delightful flavors!
Seasonal Flavor Boosts

To elevate your Pizza Quinoa Casserole (Vegan!) even further, consider incorporating seasonal ingredients:
- Summer: Add zucchini or grilled eggplant for a smoky flavor.
- Fall: Mix in roasted butternut squash for sweetness.
- Winter: Toss in some kale or Swiss chard for added nutrition.
- Spring: Include asparagus or peas for a fresh crunch.
Problems & Prevention
Creating this Pizza Quinoa Casserole (Vegan!) is straightforward, but here are some tips to ensure everything goes smoothly:
- Make sure to rinse the quinoa well before cooking to remove any bitterness.
- Be cautious not to overcook the vegetables; they should be tender but still have some bite.
- If the casserole seems too dry, add a splash of vegetable broth or water before baking.
- For a crispy top, broil the casserole for the last 2-3 minutes of baking, watching closely to prevent burning.
Prep Ahead & Store
This Pizza Quinoa Casserole (Vegan!) is perfect for meal prep. Here’s how to get ahead:
You can prepare the quinoa and sauté the vegetables a day in advance. Store them separately in the refrigerator. When you’re ready to bake, simply mix them together and proceed with the assembly steps. The assembled casserole can also be made ahead of time and stored in the fridge for up to 3 days. Just bake it when you’re ready to enjoy!
- Freezing: To freeze, let the casserole cool completely, then wrap it tightly in plastic wrap and aluminum foil. It can be frozen for up to 3 months. Thaw in the refrigerator overnight before baking.
Pizza Quinoa Casserole (Vegan!) FAQs
Can I use a different type of quinoa?
Absolutely! Red or black quinoa can be used for a different flavor and color. Just keep in mind that cooking times may vary slightly.
Is there a substitute for vegan mozzarella?
Yes! You can use nutritional yeast for a cheesy flavor or try another brand of vegan cheese that melts well.
How do I make this dish gluten-free?
This recipe is already gluten-free as long as you ensure your vegan cheese and tomato sauce are also gluten-free. Always check labels for hidden gluten.
Can I add protein to this casserole?
Of course! You can add cooked lentils, chickpeas, or even some vegan sausage to boost the protein content.
What to Make After This
Once you’ve enjoyed your Pizza Quinoa Casserole (Vegan!), here are a few other delicious recipes to try:
The Takeaway
In a world full of fast food and takeout, this Pizza Quinoa Casserole (Vegan!) stands out as a nourishing option that doesn’t compromise on flavor. It’s a delicious way to incorporate more plant-based foods into your diet while still enjoying the comforts of pizza. With a handful of fresh ingredients and a bit of time, you can create a meal that is not just filling but also packed with nutrients. Next time you crave pizza, reach for this casserole recipe instead—it’s sure to satisfy!

Pizza Quinoa Casserole (Vegan!)
Ingredients
- 1 cup white quinoa (uncooked)
- 1 yellow onion
- 1 green bell pepper
- 8 oz. mushrooms
- 4 cloves garlic
- 1 cup fresh baby spinach
- 3 roma tomatoes
- 15 oz. can tomato sauce
- 3/4 cup vegan mozzarella shreds
- 2 tsp. Italian seasoning
- 2 Tbsp. fresh basil (for serving)
Instructions
- Rinse 1 cup of white quinoa under cold water. In a medium saucepan, combine the rinsed quinoa with 2 cups of water. Bring to a boil, then reduce the heat to low, cover, and let it simmer for about 15 minutes or until all the water is absorbed. Fluff with a fork and set aside.
- In a large skillet, heat a drizzle of olive oil over medium heat. Add the diced yellow onion and sauté until translucent, about 3-4 minutes. Then add the chopped green bell pepper, sliced mushrooms, and minced garlic. Cook for an additional 5-7 minutes, stirring occasionally, until the mushrooms are tender and the mixture is fragrant.
- Add the cooked quinoa to the skillet with the sautéed vegetables. Stir in the fresh baby spinach, diced roma tomatoes, tomato sauce, Italian seasoning, and half of the vegan mozzarella shreds. Mix thoroughly until everything is well combined.
- Preheat your oven to 375°F (190°C). Transfer the quinoa mixture to a baking dish, spreading it evenly. Top with the remaining vegan mozzarella shreds.
- Bake in the preheated oven for about 25-30 minutes, or until the cheese is melted and bubbly. Remove from the oven and let it cool for a few minutes before serving.
- Garnish your Pizza Quinoa Casserole (Vegan!) with fresh basil before serving. Dig in and enjoy the delightful flavors!
Equipment
- Medium Saucepan
- Large Skillet
- Baking Dish
- Spatula
- Measuring cups and spoons
- Knife and cutting board
Notes
- Rinse quinoa well before cooking to remove bitterness.
- Don’t overcook vegetables; they should be tender but have some bite.
- If casserole seems dry, add a splash of vegetable broth before baking.
- For a crispy top, broil for the last 2-3 minutes, watching closely.
