1 pound lean ground beef
1 small onion -- chopped
1 teaspoon salt
1/4 teaspoon garlic powder
1 teaspoon Worcestershire sauce
1/4 cup flour
1 1/4 cups hot water
2 teaspoons beef bouillon
2 tablespoons red wine
6 ounces shell macaroni
1 can sliced mushrooms - (2 oz) -- drained
1 cup dairy sour cream

In skillet cook ground beef and onion until red color disappears. Drain meat and place in slow-cooker. Stir in salt, garlic powder, Worcestershire sauce, and flour. Add water, bouillon, and wine; mix well. Cover and cook on LOW for 2 to 3 hours.

In the meantime, cook macaroni according to package directions. Add cooked macaroni, mushrooms, and sour cream to slow-cooker; stir to mix ingredients. Cover and cook on HIGH for 10 to 15 minutes.