Fill rocks glass and mixing tumbler with ice
Add 2 oz of rum to the mixing tumbler
Add 1½ oz of lemon juice to the mixing tumbler
Top off with 1½ oz simple syrup
(optional) add in an egg white for a frothy version
Put the lid on tumbler and shake until outside is frosted over
Replace lid with strainer and pour over ice into a rocks glass
Garnish with 3 cherries on 4” drink skewer (and a lemon wheel, if you like)
Enjoy!