Salt and pepper thinly sliced chip beef. Sauté til just brown and dash w worcheshire sauce. Thinly slice red onion then sauté on stove.
Take a Ciabatta semolina roll and cut in half. One side smear with chimichurri and the other side American cheese. Pop under broiler to toast. Top one side w steak, onions and the other with arugula. Combine, cut and enjoy