To cool the martini glass, add a couple ice cubes.
Remove the ice from the glass and fill it with limoncello, lychee juice, and vodka.
Add Double Dutch double lemon mixer or ordinary lemonade to taste. Old-fashioned lemonade also works wonderfully.
Serve with a lychee or two on a cocktail stick balanced on the glass.
Recipe Note
Garnishing your drink with whole lychees can even brighten up the citrus flavors of the beverage, making it even more refreshing and pleasing to the eye.