Quinoa Mushroom Spinach Casserole
A twist on a classic dish, quinoa is layered with traditional flavors in this Mushroom Spinach Casserole.
Packed with protein and all nine essential amino acids, the quinoa is a great source of fiber and perfect for a meatless Monday!
Be sure to check out our other vegetarian recipes, too!
This post contains affiliate links.

Quinoa Mushroom Spinach Casserole
Quinoa is a highly nutritious food that is rich in protein, fiber, vitamins and minerals, making it a popular ingredient in health-conscious and vegetarian diets.
It can be cooked and used as a side dish, added to soups and salads, or used as a base for main dishes like this delicious casserole.
Bicuzat Vintage Style Pottery Bakeware Casserole DishRectangular Ceramic Bakeware Set
3 Pack Ceramic Baking Dish for Oven
3 Pack Ceramic Bakeware Set
This casserole takes 10 minutes to prep and 30 minutes to cook.

It serves 6.
A special thanks to SuccessRice.com for this rice.
Be sure to check out these additional easy weekday casserole recipes!
Ingredients for casserole:
- 2 bags Success Tri-Color Quinoa
- 1 tablespoon olive oil
- 2 garlic cloves, chopped
- 1/2 cup onion, chopped
- 1 cup mushrooms, sliced
- 4 cups baby spinach leaves
- 3 cups tomato sauce
- 2 cups ricotta cheese
- 1 egg, lightly beaten
- 1/2 cup grated Parmesan cheese, divided
- 1 tablespoon Italian seasoning
- 1 1/2 cups shredded mozzarella cheese, divided


Directions:
Prepare quinoa according to package directions.
Preheat oven to 375 F.
In large skillet, heat oil over medium heat. Add garlic and onions; saute 1 minute. Add mushrooms and cook 5 minutes, stirring occasionally. Add spinach and stir until wilted, about 2 minutes. Stir in tomato sauce and keep warm.
In medium bowl, combine ricotta, egg, 1/4 cup Parmesan cheese and Italian seasoning.
Cuisinart 12-Piece Kitchen Knife Set10 Piece Stainless Steel Measuring Cups and Spoons Set
Stainless Steel Mixing Bowls with Airtight Lids
Food Grade Silicone Rubber Spatula Set for Baking
Place 1 cup sauce in bottom of 2-quart baking dish. Spread half of quinoa evenly over sauce. Top with half of ricotta mixture. Top with 1 cup sauce. Sprinkle with 1 cup mozzarella. Repeat layers, finishing with remaining mozzarella and Parmesan cheese.

Bake uncovered 30 minutes. Serve warm.
For more delicious casserole ideas!
Delish Insanely Easy Casseroles – 80+ Amazing Comfort Food RecipesThe Best Casserole Cookbook Ever
Once Upon a Chef: Weeknight/Weekend: 70 Quick-Fix Weeknight Dinners + 30 Luscious Weekend Recipes
Casserole Cookbook: Embrace the Art of Effortless Cooking with a Treasury of 1500 Days’ Worth of Delicious Recipes

Quinoa Mushroom Spinach Casserole
A twist on a classic dish, quinoa is layered with traditional flavors in this Mushroom Spinach Casserole.
Ingredients
- 2 bags Success Tri-Color Quinoa
- 1 tablespoon olive oil
- 2 garlic cloves, chopped
- 1/2 cup onion, chopped
- 1 cup mushrooms, sliced
- 4 cups baby spinach leaves
- 3 cups tomato sauce
- 2 cups ricotta cheese
- 1 egg, lightly beaten
- 1/2 cup grated Parmesan cheese, divided
- 1 tablespoon Italian seasoning
- 1 1/2 cups shredded mozzarella cheese, divided
Instructions
- Prepare quinoa according to package directions.
- Preheat oven to 375 F.
- In large skillet, heat oil over medium heat. Add garlic and onions; saute 1 minute. Add mushrooms and cook 5 minutes, stirring occasionally. Add spinach and stir until wilted, about 2 minutes. Stir in tomato sauce and keep warm.
- In medium bowl, combine ricotta, egg, 1/4 cup Parmesan cheese and Italian seasoning.
- Place 1 cup sauce in bottom of 2-quart baking dish. Spread half of quinoa evenly over sauce. Top with half of ricotta mixture. Top with 1 cup sauce. Sprinkle with 1 cup mozzarella. Repeat layers, finishing with remaining mozzarella and Parmesan cheese.
- Bake uncovered 30 minutes. Serve warm.
Recommended Products
As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.
Nutrition Information:
Yield: 6 Serving Size: 1Amount Per Serving: Calories: 340Total Fat: 17gSaturated Fat: 9gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 78mgSodium: 1058mgCarbohydrates: 25gFiber: 6gSugar: 7gProtein: 25g
Nutrient values are only estimates provided by online calculators. Various factors can change the nutritional information in any given recipe.