1. In a bowl coat wings with oil and then season with salt and pepper. Let stand for 30 minutes.
2.For the sauce, in a medium saucepan saute red onion in butter over medium heat for approximately 5 minutes until tender. Add mango and lower heat slightly. Cook and stir until mango soften and start to turn into a sauce. Stir in the Jelly, hot sauce, chili flakes, water and mustard decrease heat to low and simmer until most of the mango chunks are gone. Let cool slightly and blend in a food processor until if you desire a smoother consistency.
3. Grill wings until done (at least 165 degrees with meat therm). For last 10 minutes of grilling move away from coals cooking indirectly (or burner if using gas) and brush with sauce occasionally.
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