In a small bowl, combine all ingredients for the lemon soy dressing. Set aside.
In a large bowl, combine the salad ingredients. Toss with ⅔ of the dressing.
Arrange two lettuce leaves to form a bowl: tuck one lettuce leaf inside another, repeat with remaining two leaves. Divide the salad into the two lettuce cups then drizzle the extra dressing. Garnish with coriander and extra sesame seeds.