This hearty, creamy, and flavorful casserole is perfect for vegetarians, naturally gluten-free, and so satisfying you won’t miss the meat. It is easily made with pantry staples and can be easily customized for dietary preferences.

A portion of a southwest vegetarian bake served on a white plate made with a recipe from Caring Casserole.
Easy Southwest Vegetarian Casserole Recipe

Looking for more dairy-free and gluten-free comfort food? Try my Dairy-Free Gluten-Free Potato Soup for a creamy, cozy meal, or whip up a Dairy-Free Gluten-Free Potato Casserole for a crowd-pleasing side dish. And if you’re craving a classic, this Dairy-Free Gluten-Free Lasagna delivers all the flavor without the allergens!

Ingredients You’ll Need

  • ¾ cup uncooked brown rice
  • 1½ cups water
  • 1 can (15 ounces) black beans, rinsed and drained
  • 1 can (about 15 ounces) of corn, drained
  • 1 can (10 ounces) diced tomatoes and green chiles, drained
  • 1-2 cups shredded cheddar cheese (or Mexican cheese blend), divided (diary-free works)
  • 1 cup salsa
  • 1 cup sour cream (plant-based works for dairy-free)
  • ¼ tsp dried oregano
  • ½ tsp garlic powder
  • ½ tsp onion powder
  • 1½ tsp ground cumin
  • 1 tablespoon chili powder
  • Garnishes: Chopped avocado, chopped tomatoes, chopped cilantro, and sour cream

How to Make Southwestern Vegetarian Bake

  1. Cook the Rice:
    In a small saucepan, bring the rice and water to a boil. Reduce heat; simmer, covered, until rice is tender, 35-40 minutes.
    TIP: For a quicker option, use an Instant Pot or rice cooker.
    Cooked rice in a bowl.
  2. Preheat the Oven:
    Preheat your oven to 350°F (175°C).
  3. Assemble the Casserole:
    In a large bowl, combine the cooked rice, black beans, corn, diced tomatoes, salsa, sour cream, 1 cup cheese, and spices. Transfer the mixture to a 9×13-inch baking dish coated with cooking spray.
    Cooked rice, black beans, corn, diced tomatoes, salsa, sour cream, 1 cup cheese and spices combined in a bowl.
  4. Bake:
    Cover the dish with foil and bake for 30 minutes. Remove the foil, sprinkle the casserole with remaining shredded cheese, and bake uncovered for an additional 5-10 minutes, or until the cheese is melted and bubbly.
    Mixture placed in a baking dish and topped with cheddar cheese, ready to bake in the oven.
  5. Rest and Serve:
    Let the casserole stand for 5-10 minutes before serving. Garnish with your favorite toppings like avocado, tomatoes, cilantro, or sour cream.
    Casserole fresh out the oven and left to stand for 5-10 minutes before serving.

Dairy-Free & Vegan Option

This casserole is easily made vegan and dairy-free by using plant-based sour cream and cheese. My daughter and I both have a dairy allergy, and we love it prepared this way. I reduce the cheese by using just 1 cup on top—the new Daiya Shredded Cheddar melts wonderfully! This casserole remains creamy, flavorful, and just as comforting as the original. The recipe adapts beautifully without sacrificing taste or texture, proving that dietary restrictions don’t have to mean giving up on deliciousness.

Nutritional Benefits

It’s Diabetic-Friendly Too:

This casserole is a great option for those managing diabetes. Brown rice has a lower glycemic index than white rice, helping to keep blood sugar levels steady. The black beans, corn, and vegetables provide a good dose of fiber, which slows down carbohydrate absorption and promotes a balanced meal. Using reduced-fat dairy helps lower saturated fat, while choosing low-sodium canned goods keeps sodium in check. To further reduce fat, I skip the cheese inside the casserole and only add 1 cup to the top, ensuring the dish remains flavorful and satisfying.

Estimated Exchanges (Per Serving):

For a 1/6th portion of the casserole:

  • 1 ½ starch exchanges (from brown rice, beans, and corn)
  • 1 vegetable exchange (from tomatoes, salsa, and corn)
  • 1 lean protein exchange (from beans and reduced-fat cheese)
  • 1 fat exchange (from sour cream and cheese)

This recipe provides general nutritional guidance based on ingredient choices. If you have specific dietary needs or health concerns, please consult a healthcare provider or nutritionist for personalized advice.

This Southwestern Vegetarian Bake is a hearty, budget-friendly meal that’s easy to make with pantry staples. Whether you’re cooking for a busy weeknight, meal prepping, or bringing a dish to a friend, it’s a comforting and versatile choice. The leftovers are just as delicious—use them as a burrito filling or a dip for tortilla chips.

With its customizable ingredients and diet-friendly options, this casserole works for vegetarians, those managing diabetes, or anyone looking for a nutritious, satisfying meal. Adjust the spices, swap the toppings, or modify the cheese to make it your own!

Personal Note

This recipe is a great reminder of how food brings comfort and connection. Every time my daughter and I make this dairy-free version, it shows us that we can turn our allergy challenges into something delicious without feeling like we’re missing out. And when we share it with others, it feels even more special, because it’s a meal that everyone, even those with allergies, can enjoy and feel included and cared for. ❤️

Southwest Vegeterian Bake

This hearty, creamy, and flavorful casserole is perfect for vegetarians, naturally gluten-free, and so satisfying you won’t miss the meat. It is easily made with pantry staples and can be easily customized for dietary preferences.
Prep Time 45 minutes
Cook Time 30 minutes
Servings: 6

Ingredients
  

  • ¾ cup uncooked brown rice
  • cups water
  • 1 can black beans, rinsed and drained (15 oz)
  • 1 can corn, drained (15 oz)
  • 1 can diced tomatoes and green chiles, drained (10 oz)
  • 1-2 cups shredded cheddar cheese (or Mexican cheese blend), divided
  • 1 cup salsa
  • 1 cup sour cream (plant-based works for dairy-free)
  • ¼ tsp dried oregano
  • ½ tsp garlic powder
  • ½ tsp onion powder
  • tsp ground cumin
  • 1 tbsp chili powder

Method
 

  1. Cook the Rice: In a small saucepan, bring the rice and water to a boil. Reduce heat; simmer, covered, until rice is tender, 35-40 minutes.
  2. Preheat the Oven: Preheat your oven to 350°F (175°C).
  3. Assemble the Casserole: In a large bowl, combine the cooked rice, black beans, corn, diced tomatoes, salsa, sour cream, 1 cup cheese and spices. Transfer the mixture to a 9×13-inch baking dish coated with cooking spray.
  4. Bake: Cover the dish with foil and bake for 30 minutes. Remove the foil, sprinkle the casserole with remaining shredded cheese, and bake uncovered for an additional 5-10 minutes, or until the cheese is melted and bubbly.
  5. Rest and Serve: Let the casserole stand for 5-10 minutes before serving. Garnish with your favorite toppings like avocado, tomatoes, cilantro, or sour cream.

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