This vegan Mexican casserole is a delightful and nutritious dish that brings together the vibrant flavors of Mexico in a single, easy-to-make meal. Perfect for a weeknight dinner or a potluck, this casserole is packed with protein, fiber, and a variety of spices that will tantalize your taste buds.
If you don't usually stock quinoa in your pantry, you might need to pick some up at the supermarket. Quinoa is a versatile grain that cooks quickly and adds a nice texture to the casserole. Additionally, make sure you have cumin, chili powder, garlic powder, and onion powder on hand, as these spices are essential for achieving the authentic Mexican flavor.

Ingredients for Vegan Mexican Casserole Recipe
Quinoa: A protein-rich grain that serves as the base for the casserole.
Black beans: Adds protein and a hearty texture to the dish.
Corn: Provides sweetness and a bit of crunch.
Salsa: Brings a tangy and spicy flavor to the casserole.
Diced tomatoes: Adds moisture and a fresh tomato taste.
Cumin: A spice that adds a warm, earthy flavor.
Chili powder: Adds heat and depth to the dish.
Garlic powder: Provides a subtle garlic flavor.
Onion powder: Adds a mild onion taste.
Salt: Enhances the overall flavor.
Pepper: Adds a bit of heat and sharpness.
Technique Tip for This Recipe
When preparing this vegan Mexican casserole, ensure that the quinoa is thoroughly rinsed before combining it with the other ingredients. This step removes the natural coating called saponin, which can make the quinoa taste bitter or soapy. Additionally, for a richer flavor, consider toasting the quinoa in a dry skillet over medium heat for a few minutes until it becomes fragrant and slightly golden before mixing it with the black beans, corn, and salsa. This extra step can enhance the overall taste and texture of the dish.
Suggested Side Dishes
Alternative Ingredients
quinoa - Substitute with brown rice: Brown rice provides a similar texture and is also a good source of fiber and nutrients.
black beans - Substitute with pinto beans: Pinto beans have a similar texture and flavor profile, making them a great alternative.
corn - Substitute with frozen peas: Frozen peas add a sweet flavor and similar texture to the casserole.
salsa - Substitute with diced tomatoes with green chilies: This combination provides a similar flavor with a bit of extra heat.
diced tomatoes - Substitute with crushed tomatoes: Crushed tomatoes offer a similar consistency and flavor.
cumin - Substitute with ground coriander: Ground coriander has a slightly different but complementary flavor to cumin.
chili powder - Substitute with paprika: Paprika provides a milder heat and a similar smoky flavor.
garlic powder - Substitute with fresh minced garlic: Fresh minced garlic offers a more intense and aromatic flavor.
onion powder - Substitute with finely chopped onions: Finely chopped onions provide a fresh and robust flavor.
salt - Substitute with soy sauce: Soy sauce adds a salty flavor along with a bit of umami.
pepper - Substitute with cayenne pepper: Cayenne pepper adds a bit more heat and a similar peppery flavor.
Other Alternative Recipes Similar to This Casserole
How to Store or Freeze This Casserole
Allow the casserole to cool completely before storing. This prevents condensation from forming, which can make the dish soggy.
Transfer the cooled casserole to an airtight container. If you prefer, you can also portion it out into smaller containers for easy reheating.
Store the container in the refrigerator. The casserole will stay fresh for up to 4-5 days.
For longer storage, consider freezing the casserole. Wrap the entire baking dish tightly with plastic wrap and then cover with aluminum foil, or transfer portions to freezer-safe containers.
Label the containers with the date so you can keep track of how long it has been stored.
When ready to eat, thaw the casserole in the refrigerator overnight if frozen.
Reheat in the oven at 350°F (175°C) until heated through, approximately 20-25 minutes. If reheating from frozen, it may take a bit longer.
For a quicker option, you can also reheat individual portions in the microwave. Place the portion in a microwave-safe dish, cover, and heat on high for 2-3 minutes, stirring halfway through.
To maintain the casserole's texture, avoid reheating multiple times. Only reheat the amount you plan to consume.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Transfer the leftover Vegan Mexican Casserole to an oven-safe dish.
- Cover the dish with aluminum foil to prevent it from drying out.
- Bake for 20-25 minutes, or until heated through. The quinoa should be steaming hot and the black beans and corn should be tender.
- For a slightly crispy top, remove the foil for the last 5 minutes of baking.
Microwave Method:
- Place a portion of the casserole in a microwave-safe dish.
- Cover the dish with a microwave-safe lid or a damp paper towel to retain moisture.
- Heat on high for 2-3 minutes, stirring halfway through to ensure even heating.
- Check the temperature and heat for an additional 1-2 minutes if necessary, until the salsa and diced tomatoes are hot.
Stovetop Method:
- Add a small amount of vegetable broth or water to a skillet or saucepan.
- Transfer the leftover casserole to the skillet.
- Cover and heat over medium-low heat, stirring occasionally.
- Cook until the quinoa and vegetables are heated through, about 10-15 minutes.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place the leftover casserole in an air fryer-safe dish.
- Cover the dish with aluminum foil to prevent the top from burning.
- Heat for 10-15 minutes, checking halfway through. Remove the foil for the last 5 minutes to crisp up the top if desired.
Best Tools for This Recipe
Oven: Used to bake the casserole at the specified temperature.
Mixing bowl: Used to combine all the ingredients together before transferring them to the baking dish.
Baking dish: The vessel in which the casserole is baked.
Aluminum foil: Used to cover the baking dish to ensure even cooking and prevent the top from burning.
Measuring cups: Used to measure out the quinoa, salsa, and other ingredients accurately.
Can opener: Used to open the cans of black beans and corn.
Spoon: Used to mix the ingredients together in the mixing bowl.
Oven mitts: Used to safely handle the hot baking dish when removing it from the oven.
How to Save Time on Making This Casserole
Pre-cook the quinoa: Cook the quinoa in advance and store it in the fridge. This will cut down on the overall cooking time.
Use canned ingredients: Opt for canned black beans and corn to save time on soaking and cooking.
Pre-mix spices: Combine the cumin, chili powder, garlic powder, and onion powder in a small container ahead of time.
One-bowl mixing: Mix all ingredients in one bowl to minimize cleanup and streamline the process.
Batch cooking: Double the recipe and freeze half for a quick meal later.

Vegan Mexican Casserole
Ingredients
Main Ingredients
- 1 cup Quinoa rinsed
- 1 can Black Beans drained and rinsed
- 1 can Corn drained
- 1 cup Salsa
- 1 cup Diced Tomatoes
- 1 teaspoon Cumin
- 1 teaspoon Chili Powder
- 1 teaspoon Garlic Powder
- 1 teaspoon Onion Powder
- to taste Salt
- to taste Pepper
Instructions
- Preheat your oven to 375°F (190°C).
- In a mixing bowl, combine quinoa, black beans, corn, salsa, diced tomatoes, cumin, chili powder, garlic powder, onion powder, salt, and pepper.
- Transfer the mixture to a baking dish and spread it out evenly.
- Cover the dish with aluminum foil and bake for 30 minutes.
- Remove the foil and bake for an additional 10 minutes, or until the top is slightly crispy.
- Let it cool for a few minutes before serving.
Nutritional Value
Keywords
Suggested Appetizers and Desserts
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