Philly Chicken Cheese Steaks

1 Tbsp vegetable oil
1 medium onion(s), thinly sliced
1 pound uncooked boneless, skinless chicken breast, pounded and cut into strips
1/2 medium sweet red pepper(s), seeded and thinly sliced
1/2 tsp table salt
1/8 tsp black pepper
4 medium flour tortilla(s), 6-inch
4 oz Kraft 2% Milk Singles American Cheese

1. In a medium nonstick skillet, heat oil. Saute onion until browned and very soft, about 10 minutes. Add chicken and bell pepper; saute until chicken is golden brown and cooked through, 5-8 minutes. Season with salt and pepper.

2. Heat tortillas according to package directions. Spoon chicken mixture down center of each tortilla and cover with cheese; roll into cylinders and slice on diagonal.