1. Saute' onion, pepper and mushrooms.
2. Add cream cheese and half of olives; set aside.
3. Saute' each taco shell in oil to soften. Then dip each shell in enchilada sauce; put a large spoonful of the vegetable mixture in shell, top with cheese and roll up.
4. Place in 9x13-inch pan. Cover with rest of sauce and cheddar cheese and olives.
5. Bake at 350* for 20 minutes.