Looking for an easy, flavorful casserole to make this week? You’ll love this black bean quinoa casserole. It’s loaded with vegetables—roasted butternut squash, sweet potato, carrots, and red bell pepper—so every bite is rich in texture and taste. This one-pan, oven-baked casserole is hearty, protein-packed, and ideal for vegan or vegetarian meal planning.
Casseroles are classic comfort food because they’re simple to prepare, bake in one dish, and make great leftovers. This quinoa casserole combines quinoa and black beans for a complete plant-based protein profile, while a blended vegetable sauce keeps the dish creamy without dairy.
If you enjoy easy casseroles, try other comforting recipes such as sweet potato and cauliflower casserole or an easy spinach polenta pie for more weeknight-friendly options.
Why This Recipe Works
- An efficient way to use up vegetables: This casserole is flexible—swap in what you have on hand.
- Versatile serving options: Serve it as a main course or a hearty side.
- Family-friendly flavor: The southwest-style seasoning and creamy vegetable sauce appeal to both vegan and non-vegan eaters.
What Goes Into This Recipe
Below are the main components that build the casserole’s flavor and texture. Refer to the recipe section for precise amounts and step-by-step instructions.
- Quinoa: A protein-rich grain that holds up well in casseroles and makes this a satisfying vegan main dish.
- Vegetables: Butternut squash, carrots, sweet potato, and garlic are steamed and blended into a creamy sauce. Frozen squash can save prep time.
- Nutritional yeast & miso paste: Miso brings salty umami, while nutritional yeast adds a cheesy, savory note.
- Veggie broth and mustard: Broth thins and seasons the sauce; stone-ground or Dijon mustard adds depth.
- Spices: Onion powder and salt round out the savory flavors.
- Peppers & beans: Jalapeño adds heat (optional), red bell pepper adds sweetness and color, and black beans add fiber and bulk.
- Corn: Canned or frozen corn provides a sweet bite and texture contrast.
How To Make Vegan Quinoa Casserole
This casserole comes together in a few straightforward stages: cook the quinoa, steam and blend the vegetables into a creamy sauce, combine with beans and vegetables, then bake until set. The steps below summarize the process; the recipe card contains exact measurements and times.
- 1) Cook the quinoa: Prepare quinoa according to package directions, then set it aside to cool slightly.
- 2) Steam the vegetables: Steam butternut squash, carrots, sweet potato, and three garlic cloves until tender.
- 3) Blend the sauce: Place the steamed vegetables in a blender or food processor with the remaining garlic clove, miso paste, veggie broth, nutritional yeast, stone-ground mustard, onion powder, and salt. Blend until smooth and creamy.
- 4) Combine: Stir the sauce into the cooked quinoa along with diced jalapeño (if using), diced red pepper, rinsed black beans, and drained corn.
- 5) Bake: Transfer the mixture to an oven-safe dish and bake at 375°F for about 25 minutes, until heated through and slightly set on top.
Expert Tips and FAQs
- Quick shortcuts: Use frozen butternut squash or precooked sweet potato and canned beans to speed up prep without sacrificing flavor.
- Mild version: If you prefer no heat, omit the jalapeño or substitute mild green chilies.
Swap in similar winter squash options such as pumpkin, acorn, delicata, or buttercup squash. They offer comparable texture and a naturally sweet flavor when cooked.
White or tri-colored quinoa works well here. Red and black quinoa can stay firmer after cooking and may be noticeably chewier in this particular baked preparation.
Variations
- Bean swaps: Use pinto or kidney beans, or a mixed bean blend for a different texture and flavor profile.
- Extra vegetables: Add cooked broccoli, spinach, zucchini, or cauliflower to boost nutrition and bulk.
- Grain swap: Replace half the quinoa with leftover cooked brown rice for a softer texture and to use up grains on hand.
How to Store
- Refrigerator: After cooling, store the casserole in a sealed container in the fridge for up to five days—great for meal prep.
- Freezer: This casserole freezes well. Cool completely, then store in an airtight container for up to three months. Thaw overnight in the refrigerator before reheating.
- Reheating: Reheat in an oven-safe dish at 350°F for 20–30 minutes, or microwave individual portions until warm.
How to Serve
- As a main: Pair the casserole with a simple green salad or tangy slaw for a balanced meal.
- As a side: Serve it alongside roasted tofu, a vegan patty, or your favorite plant-based protein.
- Toppings: Brighten each serving with vegan sour cream, dairy-free cheese, fresh salsa, chopped cilantro, or toasted pepitas.
- Leftover ideas: Use leftovers as a filling for burritos, tacos, or quesadillas for quick lunches.
More Quinoa Recipes
- Quinoa Stuffed Peppers
- Quinoa Tater Tots
- Kale and Quinoa Soup
- Cheesy Quinoa Bowl
Photos by Alfonso Revilla
Easy Black Bean Quinoa Casserole
Ingredients
- 1 cup uncooked quinoa
- 12 ounces butternut squash, ½-inch cubes
- 3 small carrots, sliced
- 1 small sweet potato, ½-inch cubes
- 4 garlic cloves, divided
- 1 tablespoon miso paste
- 2 tablespoons veggie broth
- 2 tablespoons nutritional yeast
- 1 teaspoon stone-ground mustard (or Dijon)
- ½ teaspoon onion powder
- ¼ teaspoon salt
- 1 large jalapeño, diced (optional)
- ¾ medium red pepper, diced
- 15 ounces black beans, drained and rinsed
- 15 ounces canned corn, drained and rinsed
Instructions
- Cook the quinoa according to package directions and set aside to cool slightly.
- Steam the butternut squash, carrots, sweet potato, and three garlic cloves until fork-tender.
- Add the steamed vegetables to a blender or food processor with the remaining garlic clove, miso paste, veggie broth, nutritional yeast, mustard, onion powder, and salt. Blend until smooth and creamy.
- In a large bowl, combine the blended vegetable sauce with the cooked quinoa, diced jalapeño (if using), diced red pepper, black beans, and corn. Stir thoroughly to distribute the sauce evenly.
- Transfer the mixture to an oven-safe dish and bake at 375°F (190°C) for about 25 minutes, until heated through and the top is slightly set.
- Allow the casserole to rest for a few minutes before serving to make slicing and serving easier.
Notes
- Use frozen squash and canned beans to shorten prep time and make this recipe weeknight-friendly.
- If you prefer a milder casserole, omit the jalapeño or replace it with mild green chilies.
Nutrition (per serving)
Calories: 225 kcal • Carbohydrates: 42 g • Protein: 10 g • Fat: 3 g • Fiber: 8 g • Sodium: 490 mg
Additional Info
Author: Stephanie Lundstrom
Course: Dinner • Cuisine: American • Method: Oven • Diet: Vegan
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