COOK and stir onion in oil in medium saucepan 2 to 3 min. or until tender. Stir in brown sugar; cook 1 min., stirring occasionally. Add mango and mustard; stir until well blended. Cook until heated through, stirring occasionally. Remove from heat; cool slightly. Stir in cilantro.

SCORE ham by making shallow cuts across the surface; insert cloves into corners of scores. Place ham in roasting pan. Add 3 Tbsp. water to pan. Bake as directed on ham package, brushing with 1/2 cup of the glaze during last 20 min. of the baking time.

COOK remaining glaze in saucepan over medium heat, thinning glaze to desired sauce consistency with water. Serve as a sauce with the sliced ham.