This is a recipe that my mother developed, and I latter tweaked. My kids always loved it.
1 lb ground beef (or ground chicken)
1 pkg taco seasoning
1 cup chunky salsa
12 fajita sized flour tortillas
1 cup shredded cheddar
1 cup shredded mozzarella
Preheat oven to 400 degrees. Brown meat; drain (I like to rinse it too). Stir in taco seasoning mix and salsa. Cook until hot. IN a bowl, mix cheeses together. Lay flour tortillas on a cookie sheet (as many as will fit). Spoon taco mixture onto each tortilla. Sprinkle some cheese on top. Bake in oven until cheese is melted and tortilla is toasted.