Heat 3/4 inch vegetable oil in a medium skillet over medium heat until hot but not smoking.
Add 1 tortilla at a time and fry, until crisp, about 30 seconds each side.
Shake off excess oil and drain on paper towels.
Combine lettuce, chicken or turkey, cheese, beans and bell pepper in a bowl.
Toss with guacamole or other dressing if desired.
Place tortillas on plates and top with meat mixture. Serve immediately.