To prepare sauce, cook onion ... vinegar, water, brown sugar, Worcestershire sauce, chili powder, ... 10 minutes. Slice beef thinly and add to sauce. ... rolls. Leftover beef roast, chuck steak, rump roast, ... also may be used.
Heat oil in skillet. Add ... until tender. Add sugar and worcestershire sauce, soup, water ... to boil, add beef and heat through. Serve on rolls. Makes 6 sandwiches.