Makes 2 dozen hors d’oeuvres or 4 appetizer servings
Cut the tuna into 1/4-inch slices, then cut lengthwise into strips and across into 1/4-inch dice. Place in a small bowl.
Add the ginger oil, wasabi, sesame seeds, cilantro, 1/4 teaspoon of salt, and pepper. Stir to combine, then set aside for a few minutes to let the flavors develop.
Taste and add a bit more salt if necessary.