1 can (14 1/2 oz.) beef broth
1/4 cup flour
1 cup chopped onion
2 Tbsp. butter, melted
30 precooked meatballs, fresh or frozen
1 cup sour cream
1. Combine beef broth and flour in slow cooker, whisking until smooth. Add onion, butter and meatballs. Cover and cook on low 4 to 5 hours.
2. Add sour cream and stir until blended. Cook on High for 30 minutes. Serve over noodles. Makes 4 to 6 servings.