Toasted Sesame Cookies

Name: Toasted Sesame Cookies
Ingredients: 1 3/4 cups (249 grams) all-purpose flour; 3/4 teaspoon salt; 1/2 teaspoon baking soda; 12 tablespoons (1 1/2 sticks or 170 grams) unsalted butter, at room temperature; 1 cup (200 grams) granulated sugar; 1/2 cup (100 grams) brown sugar; 1 large egg; 2 tablespoons toasted sesame oil; 1 tablespoon water; 1 1/2 teaspoons pure vanilla extract; 3 ounces (85 grams) bittersweet or semisweet chocolate, chopped into bite-size pieces (averaging 1/2-inch with some smaller and some larger, optional); Black and white sesame seeds, for rolling