2 oz.tequila
1 tsp.Grenadine
1 oz.pineapple juice
1/2 oz.lemon juice (fresh squeezed)
Fill a mixing glass with ice. Add all ingredients and shake well - until a frost forms on the outside of the shaker. "Frost" the rim of a chilled cocktail glass with superfine sugar, then strain the drink into the glass.
Yes, the ingredients seem unusual, and yes, the cocktail is sublime.