Slash edges of ham slices to prevent curling. Drain pineapple, reserving 1/4 cup liquid. For stuffing, in medium bowl, mix pineapple liquid, corn bread, egg, onion and rosemary. On rack in open roasting pan, place 1 ham slice. Pat stuffing on ham and top with remaining ham slice.
In small bowl, mix pineapple and brown sugar until blended; spread on top. Bake in 325 degree oven for 1 1/2 hours until stuffing is hot. Makes 8 servings.