1 tbsp vegetable oil
1 medium onion, sliced
14 oz frozen beef or chicken sandwich steaks, cut into 8 pieces
1 can Campbell's Condensed Cheddar Cheese soup
1 jar mushrooms, sliced and drained
4 pita breads, cut in half

In medium skillet over medium high heat, heat oil. Add onion and cook until tender. Add sandwich steaks and cook 5 minutes or until browned, stirring often. Drain off fat. Add soup and mushrooms. Heat to a boil. Reduce heat to low and heat through. Spoon meat mixture into pita halves.