1. Swap flour tortillas for corn tortillas and warm briefly to prevent cracking; Use a mix of cheddar and Monterey Jack or pepper jack for more heat; Make ahead by assembling and refrigerating up to 24 hours then bake adding 5 to 10 minutes; Add 1 cup drained black beans or 1 cup corn to the filling if desired; Use mild or hot enchilada sauce to control spice level