STEP 4/4
Place the garlic in a roasting pan and grill it back and forth just enough to color over high heat. Then the garlic scent will soak into the mackerel. Place mackerel in a broiler pan and cover with enough mustard seed mayonnaise sauce and bake on the grill for about 15-20 minutes. Take it out once in the middle and add mayonnaise sauce so that the mackerel is seasoned well.