Chocolate Natillas with Coffee-Bean Granita

Name: Chocolate Natillas with Coffee-Bean Granita
Yield: Makes 8 Servings
Ingredients: 6 ounces bittersweet (not unsweetened) or semisweet chocolate, chopped; 3 1/4 cups whole milk, divided; 1 vanilla bean, split lengthwise; 4 large egg yolks; 3 tablespoons cornstarch; 1 14-ounce can sweetened condensed milk; 1 tablespoon vanilla extract; Coffee-Bean Granita (click for recipe)