Dinner

Quinoa Pizza Casserole Recipe

Bylina moretti October 31, 2025October 31, 2025

Introduction

If you’re a fan of pizza but want a healthier, gluten-free alternative that doesn’t compromise on flavor, Quinoa Pizza Casserole is the perfect dish for you. Combining the familiar flavors of classic pizza with nutritious quinoa, this casserole is packed with protein, fiber, and fresh vegetables. It’s an easy, satisfying meal that works great for weeknight dinners or meal prep.

A white rectangular dish filled with a three-layer quinoa casserole. The bottom layer is a dense, reddish quinoa mixture visible from the empty spot where a piece was lifted. The middle layer is melted cheese, creamy white with gooey strands stretching as a slice is being lifted by a utensil. The top layer has round, bright orange pepperoni slices and scattered green peas, sprinkled with chopped fresh green herbs, all resting on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1 cup quinoa
2 cups water or vegetable broth
2 tablespoons olive oil
1 small onion, finely chopped
1 bell pepper, finely chopped
1 cup spinach, chopped
2 cloves garlic, minced
1 ½ cups marinara sauce
2 teaspoons dried Italian seasoning
1 teaspoon red pepper flakes (optional)
1 ½ cups shredded mozzarella cheese
½ cup grated Parmesan cheese
Salt and pepper, to taste
Fresh basil leaves (for garnish)
Extra mozzarella cheese (optional, for topping)

Instructions

Step 1: Rinse the quinoa under cold water using a fine-mesh strainer to remove any bitterness. In a medium saucepan, combine quinoa and water or broth. Bring to a boil, then reduce heat to low, cover, and simmer for about 15 minutes until liquid is absorbed and quinoa is tender. Remove from heat and fluff with a fork.
Step 2: Heat olive oil in a large skillet over medium heat. Add chopped onion, bell pepper, and garlic; sauté for 5–7 minutes until softened and fragrant. Stir in chopped spinach and cook for 1–2 minutes until wilted. Season with salt, pepper, and red pepper flakes if using. Remove from heat.
Step 3: In a large bowl, combine cooked quinoa, sautéed vegetables, marinara sauce, and dried Italian seasoning. Mix well. Stir in mozzarella and Parmesan cheeses until combined.
Step 4: Grease a 9×9-inch or 8×8-inch baking dish. Transfer the quinoa mixture into the dish and spread evenly. Sprinkle extra mozzarella cheese on top if desired.
Step 5: Preheat oven to 375°F (190°C). Bake casserole for 30–35 minutes until hot, bubbly, and cheese is golden and melted. Remove from oven and let cool for a few minutes.
Step 6: Garnish with fresh basil leaves. Slice into squares and serve warm.

Tips & Variations

Make it vegan by substituting dairy cheeses with plant-based alternatives that melt well.
Add cooked chicken, turkey, or ground beef to increase protein content.
Swap in your favorite veggies like zucchini, mushrooms, or olives for variety.
For extra spice, include sliced jalapeños or additional red pepper flakes.
Use a blend of cheeses such as provolone and fontina for a richer, gooey texture.
Make your own marinara sauce from fresh tomatoes and herbs for enhanced flavor.

Storage

Store leftovers in an airtight container in the refrigerator for up to 4 days. To freeze, let the casserole cool completely, then wrap tightly with plastic wrap and aluminum foil. It keeps in the freezer for up to 3 months. To reheat, thaw overnight in the fridge and bake at 350°F (175°C) for 20–25 minutes until heated through.

How to Serve

A white rectangular baking dish holds a thick, multi-layered quinoa casserole. The top layer is golden-brown cooked quinoa mixed with melted white cheese, dotted with green jalapeño slices and fresh green basil leaves. Below this, there is a bright red tomato sauce layer, rich and slightly glossy. Underneath the sauce, there is a dense layer of cooked ground meat or a similar textured filling, visible where a square portion is being lifted with a metal spatula. Strings of melted cheese stretch from the dish to the slice being served, emphasizing the gooey texture. The dish sits on a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use a different grain instead of quinoa?

Yes, rice or couscous can be used as alternatives. Just adjust the cooking time and liquid amounts according to the grain you choose.

Can I make this casserole in advance?

Absolutely. You can prepare the casserole up to 24 hours ahead, cover it, and refrigerate. When ready, bake as directed.

Can I add meat to this casserole?

Yes, cooked chicken, turkey, or ground beef can be mixed into the quinoa mixture before baking for extra protein.

Is this recipe gluten-free?

Yes, quinoa is naturally gluten-free, and this recipe uses it as a base. Just ensure your marinara sauce is gluten-free as well.

How long does it take to reheat a frozen casserole?

Reheat covered with foil at 350°F (175°C) for about 40 minutes or until warmed through.

lina moretti