This Crockpot Beef Stroganoff is an easy, creamy, family-favorite dinner made with tender beef stew meat, savory mushrooms, onions, and garlic in a rich, flavorful sauce. Cream of mushroom soup, beef broth, Worcestershire sauce, and Dijon mustard create a delicious base, while sour cream adds a smooth, tangy finish. Serve it over egg noodles for a comforting slow cooker meal perfect for busy weeknights.