Flatten chicken to 1/4-in. thickness. In a large resealable bag, combine the flour, salt and pepper; add chicken. Seal bag and turn to coat; In a large skillet, brown chicken in oil on both sides.
Combine the orange juice, marmalade, mustard and rosemary; pour over chicken. Bring to a boil. Reduce heat; cook for 5-8 minutes or until chicken juices run clear and sauce is thickened. Stir in oranges and orange peel. Serve with rice if desired. Yield: 4 servings.