If you can't find pita fold breads, use 4 pita breads (6 inches in diameter), cut in half to form pockets.
For added crunch while you munch, grill pita fold breads lightly, and top steak with thin slices of cucumber.
Cut 2 red onions into 1/4-inch slices. Place slices on piece of heavy-duty foil. Wrap foil around onions, and pierce foil with fork. Grill 5 to 10 minutes or until tender. Serve with beef in pita fold breads.