Rim the lip of a Pilsner glass by lubricating with a lime wedge and rolling in a plate of salt. Add 4 perfect cubes of ice to the glass. In a shaker or mixing glass, combine the simple syrup, lime, grapefruit, Crema de Mezcal, and sherry over ice, and shake vigorously. Strain into the rimmed and iced Pilsner glass. Top with club soda, and garnish with the lime wedge. Serve with a tall straw.
Third place winner, Vinos de Jerez Sherry Cocktail Competition 2009