Dice the cucumber and put into cocktail shaker or a nice glass
Add a splash of seltzer to the diced cucumber, then use a muddler or fork or masher to crush the cucumber and release the juice
Add the rest of the ingredients to the shaker / glass
Add ice to the shaker / glass
Cover the cocktail shaker and shake all ingredients. If not using a shaker, then stir the ingredients with a spoon.
Pour into a pretty glass, and serve over ice.
Optional: You can decorate with a lime wedge or a cucumber slice.
Optional: You can strain out cucumber pieces or leave the cucumber pieces in the drink.