1. Preheat oven to 350 degrees. 2. Brown meat until done and add taco seasoning, tomato sauce and chiles. 3. Fill shells and place in 9x13 greased pan. 4. Mix sour cream and mushroom soup and place over enchiladas. Cover and bake at 350 degrees for 45 min. to 1 hour. For the last 15 minutes uncover enchiladas and place package of cheese over dish.