4 c Cooked Beef Strips — 2 X 1/4″
1 c Ketchup
1/2 c Cider Vinegar
1/2 c Butter Or Regular Margarine
1/4 c Sugar
2 md Onions — Thinly Sliced
2 sl Lemon
2 tb Worcestershire Sauce
4 ts Prepared Mustard
1 t Salt
1/4 ts Chili Powder
1/4 ts Black Pepper
1/2 c Water
8 Hamburger Buns
Combine all of the ingredients, except the hamburger buns, in a 4-quart Dutch oven. Cook over high heat until the mixture comes to a boil. Reduce the heat to low and simmer for 25 minutes or until the mixture thickens. Remove the lemon slices. Pour into a container, cover and refrigerate. TO SERVE: Warm over medium heat and serve in the hamburger buns.