Whisk all the dressing ingredients together until well combined and drizzle a portion over the sliced fish. Let it marinate for 10 minutes.
Toss the mixed lettuce and lollo leaves together, then drizzle with the remaining dressing.
Arrange the salad mixture in the center of a plate, surround it with the marinated fish slices, sprinkle with black sesame seeds, and serve.
To get the best flavor and texture, choose ultra-fresh fish and use only the most tender lettuce leaves. It’ll make a noticeable difference in every bite.