1.Cook Ground Beef In A Large Skillet Over Medium Heat Until No Longer Pink. Stir Frequently, And Break Into Pieces. Drain Off Grease. 2.Add Onion, Celery, And Green Pepper To The Skillet, And Season With Salt And Pepper. Cook, Stirring Until Onion Is Soft, About 5 Minutes. Stir In Ketchup, Vinegar, Sugar, Worcestershire Sauce, And Tomato Sauce. Cover, Reduce Heat To Low, And Simmer For 20 Minutes. Spoon Onto Buns, And Serve.