Ambassador Shirley Temple Cocktail

Ice cubes   1 ½ tablespoon (3/4 oz.) lime juice   1 ½ tablespoon (3/4 oz.) Chile Grenadine or purchased grenadine syrup   3 tablespoon (1 1/2 oz.) silver tequila (optional)   4 - 6 ounce ginger beer, chilled     Luxardo cherry  

Chile Grenadine

1 cup pomegranate juice 1 cup granulated sugar ¾ cup packed brown sugar 1 pasilla or guajillo chile, seeded and crushed