Cheesy Mexican Tortilla Casserole Ingredients Nonstick cooking spray 1 tablespoon olive oil 1 small yellow onion, chopped 1 green bell pepper, chopped 1 small jalapeno pepper, seeded and diced 1 teaspoon minced garlic 1 can (14 ounces) chopped tomatoes, drained ½ cup salsa 1 can black beans, drained and rinsed ½ teaspoon ground cumin 1