In a small skillet heat oil and lightly brown tortilla, 1 at a time; set aside.

Cook ground beef and onion until browned then remove from heat. Stir in garlic, chilies, beans and taco sauce.

In a 9 inch pie plate place 1 tortilla, top with 1/4 of meat mixture and 1/4 of cheese; repeat with remaining tortillas.

Bake at 350 for 30 minutes. Sprinkle with shredded lettuce and diced tomato.