Place stew meat in slow cooker. Sprinkle ranch dressing mix over the top. Pour the cream of mushroom soup over the top. Cover and cook on LOW for 6-8 hours. Add mushrooms and sour cream. Cover and cook until heated through. Serve over rice or noodles. Makes 4 servings.
I love these type of recipes because they are easy to make, have simple ingredients, and are very tasty. 4 stars.