Arrange chicken peices in large shallow glass baking dish. Combine orange juice, olive oil, cumin and salt, blending well. Pour orange juice mixture over chicken breasts, turning to coat well. Cover and marinate 4 to 6 hours or overnight. Grill chicken breasts over mesquite coals or broil in oven 15 to 20 minutes or until cooked, turning once. To serve, split breasts in halves and serve topped with Chipotle Chantilly Sauce. Serve remaining sauce on side, if desired. Chipotle Chantilly Sauce: Whip yolks, water, lemon juice and salt in top of double boiler over very hot water. Slowly add butter in steady stream while continuing to whip yolk mixture. Whip in chile, then fold in whipped cream. Serve warm. Makes about 2 1/2 cups. Posted to MM-Recipes Digest V4 #078 by "C. Jay Ahlgrim" on Mar 17, 1997