Turn crockpot on low, drizzle bottom with olive oil

Set beef in crockpot, add chopped veggies& all sauces&seasonings to ur taste(except mustard)

Cover crockpot and let slow cook until meat is tender & falls apart easily...approximately 10-12hrs...I prefer to let it slow cook overnight for a meal for the following day

Pull meat apart, place on sandwich rolls with onions&bell peppers,pour on some of the remaining seasoned liquid from the pot or top with mustard (optional )