Six or eight hours before you want to serve the roast, preheat oven to 375 ... about 1/2 the Au Jus mix over the fat portion ... Serve over meat slices.
Season rump roast according to taste and put in crock pot with onion, au jus seasoning, pepperocini (as many as ... tender. Serve on beef or hamburger buns.
Place roast in pan. Sprinkle with Good Season dressing mix. Mix Au Jus mix according to directions. Pour over beef. Cook 250 to 300 ... served on hard rolls).