1Heat oven to 400°F. Spray 15x10x1-inch baking pan with nonstick cooking spray. Place chicken breasts on pan. Place potatoes, bell pepper and onion on pan with chicken.
2Pour melted margarine over chicken and vegetables. In small bowl, combine cheese, garlic powder and paprika; sprinkle over chicken and vegetables.
3Bake at 400°F. for 30 to 35 minutes or until chicken is fork tender and juices run clear, stirring vegetables once halfway through cooking.