Find Recipes Instantly! (Type the Recipe name or any Ingredient) Barbecued Short Ribs 3 lbs. Flanken short ribs 1/2 Cup onion barbecue sauce 1/2 Cup ketchup 2 Tablespoons brown sugar 2 Tablespoon lemon juice 2 Tablespoons mustard Mix ingredients and marinate meat overnight. Bake uncovered at 350 degrees in a large pan in one layer until tender, at least two hours, basting from time to time with the marinade. Serve with sauce. Serves 6.