Heat oil over medium high heat. Place tortillas in oil for 15 seconds on each side to soften; set aside. Pour off oil; brown meat with seasonings over medium heat. Tear 4 tortillas into 6 pieces; layer in casserole dish. Cover with 1/4 of the the meat, soup, chopped onions, chilies, olives and cheese. Repeat, ending with cheese on top. Bake at 325 degrees until bubbling. Randy Rigg