In a heavy skillet, heat the oil and saute the onion until softened. Remove and drain.
Add additional oil to the skillet to a depth of 1/4 inch and reheat. Lightly fry a tortilla in the oil until softened. Remove and dip the tortilla into the hot mole sauce and place on a baking sheet or oven proof serving dish.
Place some of the turkey on the tortilla and top with some of the sauteed onions and cheese.
Roll up the tortilla ending with the seam remaining on the bottom. Repeat with remaining tortillas. Pour additional sauce over the enchiladas.
Either quickly reheat the enchiladas in a 350 degree oven, under a broiler, or in a microwave oven. Garnish with additional cheese and serve.