Preheat oven to 425°.
Cover a large baking sheet with parchment paper. Combine buttermilk and egg whites in a shallow dish; stir well with a whisk. Combine flour, cornmeal, 1/2 teaspoon salt, black pepper, and red pepper in a separate shallow dish; stir well. Sprinkle chicken evenly with remaining 1/2 teaspoon salt. Dip chicken in buttermilk mixture; dredge in flour mixture.
Heat oil in a large nonstick skillet over medium-high heat. Add chicken to pan; cook 4 minutes on each side or until lightly browned. Place chicken on prepared baking sheet; lightly coat chicken with cooking spray. Bake at 425° for 30 minutes or until chicken is done.