1. Cook chicken with onions, garlic, peppers, tomatoes, cumin, and chili powder. Squeeze in some lime juice. Alternatively, you could use any seasoned meat you use for tacos.
2. Oil up or butter a casserole dish or dutch oven. Make a layer of tortillas.
3. Add a layer of chicken (or taco meat). Can also add a layer of beans or sautéed veggies.
4. Add a layer of cheese.
5. Repeat layers to the top of your dish, ending with tortillas sprinkled with cheese.
6. Bake/heat until cheese is melted.

Volumes depend on how many people you are trying to feed and your exact tastes!