Creamy Chicken Enchiladas

1. Chop onion and heat in a saucepan with cream of chicken soup, diced tomatoes,
   and Ranch dressing.
2. Shred cheese and separate into half.
3. Spoon 1 tablespoon of sauce and half the cheese into the center of a tortilla and add chicken.
4. Roll tortilla and top with remaining sauce.
5. Place in a 350 degree oven and bake for
   15 minutes.
6. Top with remaining cheese and serve with tortilla chips.