Creating the Beef Enchilada Casserole is straightforward. Follow these steps for a delicious meal:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C).
2. Cook Beef: In a large skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
3. Sauté Onions: Add chopped onions to the skillet and sauté until translucent, about 3-4 minutes.
4. Season: Stir in cumin, garlic powder, chili powder, salt, and pepper. Cook for an additional minute until fragrant.
5. Combine Ingredients: Mix in black beans and corn, ensuring everything is well combined.
6. Add Enchilada Sauce: Pour in 1 cup of enchilada sauce and stir until the mixture is evenly coated. Remove from heat.
7. Layer Casserole: In a baking dish, spread a thin layer of enchilada sauce on the bottom. Then place half of the tortilla strips evenly over the sauce.
8. Add Beef Mixture: Spoon half of the beef and bean mixture over the tortilla strips, then sprinkle with 1 cup of shredded cheddar cheese.
9. Repeat Layers: Repeat the layering process with the remaining tortilla strips, beef mixture, and top with the last cup of cheese.
10. Bake: Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes. Remove the foil and bake for an additional 15-20 minutes until the cheese is bubbly and golden.
11. Cool: Once done, remove the casserole from the oven and let it cool for about 10 minutes before serving.
12. Add Sour Cream: Before serving, dollop sour cream on top for added richness if desired.