oven 350°F . shred chicken. stack tortillas ; wrap in foil. warm in oven 15 minutes. in large skillet over medium heat . add oil and onion cook and stir 4 minutes, add salt, black pepper powder,chicken stirring. add sour cream ; heat gently ; do not boil. just before serving, Peel avocado . cut in half ; remove pit. and smash. to each taco 3 tablespoons chicken mixture into center of each tortilla. top with salsa avocado cheese . roll tortilla half to each.