CHEESESTEAK POCKETS

1 tablespoon vegetable oil
1 medium onion, sliced
1 package (14-ounce) frozen beef or chicken sandwich steaks, separated into 8 portions
1 can Cheddar Cheese Soup
1 jar (about 4-1/2-ounce) sliced mushrooms, drained
4 pita breads (6-inch) cut in half, forming two pockets

HEAT oil in skillet. Add onion and cook until tender. Add sandwich steaks and cook until browned. Pour off fat.
ADD soup and mushrooms and heat through. Spoon meat mixture into pita pockets. Serves 4.