Vegetarian Burritos

Ingredients

• 1 green bell pepper, sliced into thin strips
• 1 red bell pepper, sliced into thin strips
• 1 white onion, sliced into this strips
• 15 ounces refried beans
• 15 ounces black beans, drained
• 1/2 cup frozen corn
• 1 tablespoon taco seasoning
• 1/4 cup sour cream
• 2 cups iceberg lettuce, chopped
• 2 roma tomatoes, seeded and chopped
• 1 tablespoon olive oil
• 1 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 1 tablespoon unsalted butter
• 1/3 cup water
• 6 burrito-size flour tortillas
• 1 cup monterey jack and cheddar cheese blend, blend shredded