Creating the Beef Enchilada Casserole is a simple and enjoyable process. Follow these steps to bring this incredible dish to life:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Prepare a baking dish by greasing it lightly.
2. Cook the Beef: In a large skillet, heat the olive oil over medium heat. Add the diced onion and minced garlic, cooking until translucent.
3. Brown the Beef: Add the ground beef to the skillet. Cook until browned, breaking it up with a spatula. Drain any excess grease.
4. Season the Meat: Stir in the chili powder, cumin, salt, and black pepper, cooking for an additional minute.
5. Combine Ingredients: Add the enchilada sauce, black beans, and corn to the skillet. Mix until well-combined and heated through.
6. Layer the Casserole: Start layering in the prepared dish: place a layer of tortilla strips at the bottom, followed by half of the beef mixture. Sprinkle with half of the shredded cheese. Repeat the layers, ending with cheese on top.
7. Bake: Cover the dish with foil and bake for 25-30 minutes. Remove the foil and bake for another 5-10 minutes until the cheese is bubbly and golden.
8. Cool: Remove from the oven and allow it to cool for about 5-10 minutes before serving.
9. Garnish: Top with sour cream and fresh cilantro if desired.

These steps will guide you in creating this remarkable casserole that’s sure to please everyone.