Tuna Poke

Name: Tuna Poke
Ingredients: 12 ounces sashimi-grade tuna, cut into 1/2-inch cubes; 1 Thai bird chile, stemmed and minced; 1/4 cup thinly sliced Vidalia or other sweet onion; 2 tablespoons finely chopped scallion; 1 tablespoon extra-virgin olive oil; 2 teaspoons finely grated peeled fresh ginger; 1 teaspoon toasted sesame oil; 1/2 teaspoon low-sodium soy sauce; Kosher salt; Pepper; Toasted sesame seeds, for garnish