DRAIN pineapple, reserve juice. Combine reserved juice with garlic, cornstarch, Wrocestershire sauce, mustard and rosemary. Arrange chicken in shallow baking pan or broiler-proof dish, skin side up.
BROIL until browned.Stir sauce; pour over chicken. BAKE at 400'F. 30 minutes. Arrange lemon and pineapple slices around chicken. Spoon sauce from baking pan over all; continue baking 5 minutes. Garnish with fresh rosemary or parsley, if desired.