Grilled Mango Marinated Ahi Tuna

For the marinade:
Put mustard and mango butter into a medium sized bowl then mix until you have a smooth consistency. Add cut mangos, balsamic and seasonings, then drizzle in the oil.

Put the tuna in a Ziploc bag. Add half of the marinade into the bag with the fish and mix to combine. Seal the bag and place in fridge for a few hours or overnight. Reserve the remaining marinade in the refrigerator to drizzle on top of grilled fish.

For the grilling:
Heat a cast iron grill over medium-high heat. Place fish on the grill cooking 2 minutes on each side for rare or 3 minutes per side for medium rare. Drizzle some of remaining mango marinade over tuna once plated, before serving.