Sebastien Archambault’s Tuna Loin With Black Radish and Passionfruit Coulis Makes 4 servings Ingredients ¼ pound grade-1 tuna loin 1 teaspoon extra-virgin olive oil 1 leaf nori seaweed, dried 1 tablespoon soy sauce 2 pinches cayenne pepper 1 black radish, about 5 inches long 3 passionfruits 1 teaspoon sugar powder 1 pinch espelette pepper 1 pinch sea salt