2-3 pounds stew meat (or a 3-pound chuck roast, cubed)
1 teaspoon salt
1/4 teaspoon black pepper
1 medium yellow onion, diced
¼ teaspoon garlic salt
1 tablespoon Worcestershire sauce
1 ½ cups beef broth or stock
1 tablespoon ketchup
1/3 cup flour
1/3 cup milk
8 ounces sliced mushrooms
1/2 cup sour cream
Directions
Place the stew meat, salt, pepper and onion in the slow cooker. Stir to distribute the seasonings and onion. In a small bowl, combine the garlic salt, Worcestershrie sauce, beef broth and ketchup. Pour over the meat.
Cook for 7-9 hours on low or 4-5 hours on high.
About 30 minutes before serving, combine the flour and milk in a small bowl, whisking vigorously to combine well. Pour the flour mixture into the slow cooker, whisking quickly to avoid lumps. Add the mushrooms and stir.
Cook on high for 30 minutes. Stir in ½ cup sour cream right before serving. Serve over pasta, rice, or baked potatoes.