A hearty and flavorful casserole combining beans, rice, and vibrant Southwestern flavors.
Preheat your oven to 350°F (175°C).
Ensure your oven is fully preheated for even cooking.
In a large mixing bowl, combine the cooked rice, black beans, corn, diced tomatoes, salsa, sour cream, and half of the shredded cheese.
Mix thoroughly to ensure all ingredients are evenly distributed.
Season the mixture with salt and pepper to taste.
Taste the mixture before adding salt, as some ingredients may already be salty.
Transfer the mixture to a greased baking dish, spreading it out evenly.
Use a spatula to smooth the top for even baking.
Top the mixture with the sliced red onions and olives.
Arrange the toppings evenly for a visually appealing presentation.
Bake uncovered in the preheated oven for 30 minutes.
Check the casserole halfway through to ensure it's baking evenly.
Sprinkle the remaining shredded cheese over the top and bake for an additional 5-10 minutes, or until the cheese is melted and bubbly.
Let the cheese melt completely for a gooey topping.
Remove from the oven and let it cool for a few minutes before serving.
Allowing the casserole to rest helps it set and makes serving easier.
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