1. Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking dish with cooking spray or butter.
2. In a large skillet over medium-high heat, cook the ground beef for about 5 minutes until it's browned and fully cooked. Drain any excess fat.
3. Add the chopped onion, minced garlic, diced bell peppers, chili powder, cumin, salt, and pepper to the skillet with the ground beef. Cook for another 5 minutes or until the vegetables are softened.
4. Stir in the drained diced tomatoes, corn kernels, and black beans into the skillet mixture. Cook for an additional minute to combine all ingredients.
5. Spread half of the tater tots evenly on the bottom of the prepared baking dish. Pour the beef and vegetable mixture over the tater tots.
6. Sprinkle the shredded cheddar cheese over the top of the beef and vegetable mixture.
7. Drizzle the sour cream over the cheese.
8. Bake in the preheated oven for 25-30 minutes or until the tater tots are golden brown and crispy on top, and the cheese is melted and bubbly.
9. Remove from the oven and let cool for a few minutes before serving.
10. Garnish with fresh cilantro if desired, and enjoy your delicious fiesta tater tot casserole!
This recipe makes a hearty and flavorful dish that's perfect for any occasion. The combination of ground beef, vegetables, tater tots, cheese, and sour cream creates a mouthwatering texture and taste. Plus, it's easy to make and can be customized with your favorite ingredients. Give it a try and see for yourself!