Leftover German Sweet Sour Beef - cooking recipe

Ingredients

2 cups cubed cooked beef (leftover)
2 tablespoons flour
2 tablespoons butter
1/2 cup packed brown sugar
1 teaspoon ground mustard
1/2 cup apple cider vinegar
1 1/2 cups hot water
1 (1 1/3 ounce) package onion soup mix
hot buttered wide egg noodles

Preparation

Brown beef in butter. Stir in flour. Mix well. Add res of the ingredients. Simmer 20 minutes or until thickened --.
Serve over hot buttered noodles.