Veggie-Packed Quinoa Casserole Recipe
If you are searching for a wholesome, colorful, and absolutely delicious meal, the Veggie-Packed Quinoa Casserole is a must-try! This dish is an incredible harmony of protein-rich quinoa and a vibrant medley of fresh vegetables, all baked together with creamy tomato sauce and melty cheeses. Whether you’re cooking for your family or meal-prepping for the week, this casserole delivers on flavor, nutrition, and comfort in every bite. It’s not just a dish; it’s a celebration of fresh ingredients coming together in a satisfying, filling way that you’ll want to make again and again.

Ingredients You’ll Need
These ingredients are simple but absolutely essential to crafting the perfect Veggie-Packed Quinoa Casserole. Each item plays a distinct role, whether adding texture, fresh color, or bursts of flavor that make the dish so special.
- Quinoa: Rinsed and drained to keep it fluffy and remove any bitterness, quinoa forms the hearty base packed with protein and fiber.
- Vegetable broth: Cooking the quinoa in broth instead of water adds a subtle depth that enhances overall taste.
- Olive oil: Used to sauté veggies for a gentle richness and perfect texture.
- Onion & garlic: These aromatics provide a flavorful foundation that awakens the senses.
- Bell pepper: Adds a crisp sweetness and vibrant red or yellow color to brighten the casserole.
- Zucchini: Softens nicely with cooking and blends beautifully with other vegetables.
- Cherry tomatoes: Bursting with juiciness, they bring a touch of tangy freshness.
- Baby spinach: Wilts down to add earthiness and a lovely green hue.
- Mushrooms: Contribute an umami-rich, meaty texture that rounds out the veggie mix.
- Dried oregano, basil, and smoked paprika: These herbs and spices infuse an herbal warmth and subtle smoky undertone.
- Tomato sauce: Provides a creamy, tangy base to coat the quinoa and vegetables.
- Greek yogurt: Adds a smooth, tangy creaminess that elevates the sauce without heaviness.
- Red pepper flakes: Give a gentle kick of heat, balanced to taste.
- Mozzarella and Parmesan cheeses: Melt perfectly to create a golden, bubbly, gooey top layer that everyone loves.
- Fresh parsley or basil: For a fragrant, fresh finish that brightens the whole dish.
How to Make Veggie-Packed Quinoa Casserole
Step 1: Cook the quinoa
Start by bringing your vegetable broth to a boil in a medium saucepan. Rinse the quinoa well to wash away any bitterness, then add it to the boiling broth. Cover and let it simmer for about 12 to 15 minutes until all the broth is absorbed and quinoa is fluffy. Fluff it up with a fork and set aside while you prepare the veggies.
Step 2: Sauté the vegetables
Heat olive oil over medium heat in a large skillet. Add diced onion and minced garlic, sautéing until you can smell that wonderful aroma—about two minutes. Toss in diced bell pepper, zucchini, sliced mushrooms, and halved cherry tomatoes. Cook these for 5 to 7 minutes until they soften beautifully. Now sprinkle in chopped baby spinach along with dried oregano, basil, smoked paprika, salt, and pepper. Stir until the spinach wilts completely, then remove from heat and let those vibrant veggies cool slightly.
Step 3: Prepare the sauce
In a small bowl, combine the tomato sauce with creamy Greek yogurt and red pepper flakes. Mixing these ingredients together creates a luscious, tangy, and slightly spicy sauce that clings perfectly to the quinoa and vegetables.
Step 4: Combine and transfer
Preheat your oven to 190°C (375°F). In a large bowl, mix the fluffy quinoa with the sautéed vegetables and the prepared sauce until everything is evenly coated. Pour this vibrant mixture into a lightly greased 9×13-inch baking dish, spreading it out evenly to ensure every bite is just right.
Step 5: Add cheese and bake
Sprinkle shredded mozzarella and grated Parmesan cheese generously over the top of the casserole. Cover the dish with foil to keep moisture in and bake for 20 minutes. Remove the foil and bake for an additional 10 minutes to let the cheese melt thoroughly and turn a gorgeous golden brown, bubbling temptingly.
Step 6: Rest and garnish
When the timer goes off, let the casserole rest for about 5 minutes to set. Finally, scatter chopped fresh parsley or basil over the top before serving. The fresh herbs add a zesty burst that perfectly balances the warm, cheesy goodness below.
How to Serve Veggie-Packed Quinoa Casserole

Garnishes
To truly elevate your Veggie-Packed Quinoa Casserole, don’t skip the garnishes! A sprinkle of fresh parsley or basil not only brightens the flavors but also adds a lovely splash of green for visual appeal. If you love an extra tangy pop, a drizzle of lemon juice or a dollop of plain Greek yogurt on the side can be heavenly.
Side Dishes
This casserole is versatile enough to shine as a main dish, but pairing it with a crisp green salad or some roasted root vegetables really rounds out the meal. If you’d like more protein, a simple baked tofu or grilled chicken breast would pair beautifully without overpowering the veggie-packed flavors.
Creative Ways to Present
For gatherings or special dinners, try serving the Veggie-Packed Quinoa Casserole in individual ramekins with melted cheese browned on top, or scoop it into warm pita pockets for a fun twist. You can even turn leftovers into stuffed bell peppers for a new look and extra color on your plate.
Make Ahead and Storage
Storing Leftovers
Your Veggie-Packed Quinoa Casserole keeps beautifully in an airtight container in the fridge for up to 4 days. The flavors actually deepen overnight, making leftovers even tastier than the first day.
Freezing
If you want to prep ahead or save some for a future meal, this casserole freezes wonderfully. Portion it out into freezer-safe containers and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
Reheating
To warm up leftovers, cover the casserole with foil and bake at 175°C (350°F) for about 15 to 20 minutes until heated through and the cheese is melty again. You can also microwave individual servings, though the oven helps maintain that lovely baked texture.
FAQs
Can I use brown rice instead of quinoa in the Veggie-Packed Quinoa Casserole?
Absolutely! Brown rice is a great alternative if you prefer a different grain. Just be mindful it takes longer to cook, so prepare it ahead of time before combining with the vegetables and sauce.
Is this casserole suitable for vegans?
The recipe as written contains dairy in the cheeses and Greek yogurt. To make it vegan, substitute with plant-based cheese and use a dairy-free yogurt alternative. It still tastes amazing!
Can I add other vegetables to the casserole?
Yes! Feel free to customize this casserole with your favorite veggies like broccoli, carrots, or eggplant. Just adjust sautéing times as needed to ensure everything cooks evenly.
How spicy is the casserole?
The red pepper flakes add a gentle warmth that can be toned down or omitted entirely if you prefer milder flavors. You can always add them in gradually to suit your taste.
What if I don’t have fresh herbs for garnish?
Don’t worry! Dried herbs can be mixed into the casserole for extra flavor. Alternatively, a squeeze of fresh lemon juice can brighten the dish effectively if herbs aren’t available.
Final Thoughts
This Veggie-Packed Quinoa Casserole is a vibrant, comforting, and nutritious dish that effortlessly brings joy to the dinner table. It is a wonderful way to pack in wholesome vegetables while enjoying cheesy, savory satisfaction that feels like a warm hug. I hope you’ll give this recipe a try soon and discover just how delightful and versatile a veggie-filled casserole can be in your meal rotation!
PrintVeggie-Packed Quinoa Casserole Recipe
This Veggie-Packed Quinoa Casserole is a nutritious and flavorful vegetarian dish loaded with fresh vegetables, protein-rich quinoa, and a blend of hearty cheeses. Perfect as a wholesome main course, this casserole combines the goodness of spinach, mushrooms, bell pepper, zucchini, and tomatoes with aromatic herbs and a creamy tomato-yogurt sauce, all baked to bubbly perfection.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Total Time: 50 minutes
- Yield: 6 servings 1x
- Category: Main Course
- Method: Baking, Sautéing
- Cuisine: Vegetarian American
- Diet: Vegetarian
Ingredients
Quinoa
- 1 cup quinoa, rinsed and drained
- 2 cups vegetable broth
Vegetables & Aromatics
- 1 tablespoon olive oil
- 1 small onion, diced
- 2 cloves garlic, minced
- 1 bell pepper, diced
- 1 zucchini, diced
- 1 cup cherry tomatoes, halved
- 1 cup baby spinach, chopped
- 1 cup mushrooms, sliced
Seasonings
- 1 teaspoon dried oregano
- 1 teaspoon dried basil
- 1/2 teaspoon smoked paprika
- Salt and pepper to taste
- 1/2 teaspoon red pepper flakes (optional)
Sauce & Cheese
- 1 cup tomato sauce
- 1/2 cup Greek yogurt
- 1 cup shredded mozzarella cheese
- 1/4 cup grated Parmesan cheese
Garnish
- 1/4 cup fresh parsley or basil, chopped
Instructions
- Cook Quinoa: In a medium saucepan, bring 2 cups of vegetable broth to a boil. Add 1 cup of rinsed quinoa, reduce heat, cover, and let simmer for about 12-15 minutes, until all the liquid is absorbed. Fluff with a fork and set aside.
- Sauté Vegetables: In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add diced onion and minced garlic, cooking until fragrant, about 2 minutes. Stir in bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5-7 minutes until softened. Add chopped spinach, season with oregano, basil, smoked paprika, salt, and pepper, and stir until spinach wilts. Remove from heat.
- Prepare Sauce: In a small bowl, mix tomato sauce, Greek yogurt, and red pepper flakes (if using). Stir until well combined.
- Combine Ingredients: Preheat oven to 190°C (375°F). In a large mixing bowl, combine cooked quinoa, sautéed vegetables, and sauce. Mix until everything is evenly coated. Transfer the mixture to a lightly greased 9×13 inch baking dish.
- Add Cheese and Bake: Sprinkle shredded mozzarella and grated Parmesan evenly over the top of the casserole. Cover with foil and bake for 20 minutes. Remove the foil and bake for another 10 minutes, until the cheese is bubbly and slightly golden.
- Rest and Garnish: Allow the casserole to rest for 5 minutes before serving. Garnish with chopped fresh parsley or basil. Serve warm and enjoy!
Notes
- This casserole is perfect for meal prep and tastes even better the next day.
- You can substitute Greek yogurt with sour cream or a dairy-free alternative if you prefer.
- To make it vegan, omit the cheeses or use plant-based cheese substitutes.
- Feel free to add other vegetables like carrots or peas based on preference.
- Adjust red pepper flakes according to your spice tolerance.
Nutrition
- Serving Size: 1/6 casserole serving
- Calories: 320 kcal
- Sugar: 5 g
- Sodium: 480 mg
- Fat: 14 g
- Saturated Fat: 6 g
- Unsaturated Fat: 7 g
- Trans Fat: 0 g
- Carbohydrates: 36 g
- Fiber: 6 g
- Protein: 18 g
- Cholesterol: 25 mg
Keywords: quinoa casserole, vegetarian casserole, healthy casserole, veggie-packed recipe, baked quinoa dish