1: Classic Beef Enchilada Casserole - Layers of seasoned beef, cheese, and tortillas make this a crowd-pleaser.

2: Spicy Chipotle Beef Enchilada Casserole - Add some heat with chipotle peppers and jalapenos for a bold flavor.

3: Cheesy Beef Enchilada Casserole - Amp up the cheesy goodness with extra layers of melted cheese.

4: Tex-Mex Beef Enchilada Casserole - Incorporate flavors like corn, black beans, and avocado for a south-of-the-border twist.

5: Green Chile Beef Enchilada Casserole - Swap red sauce for green chile sauce for a tangy and savory flavor profile.

6: Vegetarian Beef Enchilada Casserole - Try a meatless version with mushrooms, bell peppers, and zucchini for a hearty meal.

7: Breakfast Beef Enchilada Casserole - Start your day with a savory breakfast twist by adding eggs and breakfast sausage.

8: BBQ Beef Enchilada Casserole - Infuse BBQ sauce and caramelized onions for a smoky and sweet flavor combination.

9: Mediterranean Beef Enchilada Casserole - Experiment with Mediterranean flavors like olives, feta cheese, and sun-dried tomatoes for a unique twist.