Put left-over meat through meat chopper - beef, veal, lamb, pork, or a mixture of several kinds. Season with salt, pepper, and minced onion, or any desired combination of seasonings. Moisten with left-over brown gravy or meat sauce. Wash cabbage leaves of convenient and uniform size, allowing one for each person to be served. Put into boiling water until wilted; drain. Put tablespoon or more meat on each leaf. Roll, sprinkle with salt; place folded side down in steamer, cook thirty to forty-five minutes. Serve with Brown, Plain Tomato, or Savory Sauce. In place of meat, a mixture of rice, minced parsley, and bacon which has been cooked until just beginning to brown, then chopped, may be used. Make White Sauce to serve with these rolls, using bacon drippings in place of butter. Or place rolls in baking dishes, add sauce, and bake about thirty minutes.