Brush fish with some of the residual marinade, sprinkle some black and white sesame seeds on top and place on middle shelf in oven underneath the broiler and continue to cook for about 5-6 minutes, depending on size and thickness of the fish.
*Try to aim for a medium rare doneness.
(NOTE: When halibut reaches internal temperature of 120f, remove from heat and let rest. It will continue carrying over to 125f = medium-rare.)