2In a large saucepan, combine roast beef and prepared au jus. Cook over medium heat for 5-7 minutes or until heated through.
3Meanwhile, place bread, cut side up on an ungreased baking sheet. Place a slice of beef on each piece of bread. Top with a thin layer of red peppers and a slice of cheese.
4Broil 6 in. from the heat for 4-6 minutes or until cheese is melted and bread is toasted.
5Place bread halves together to make sandwich. Serve with remaining au jus if desired.