Bright and Breezy A.K.A. The Dark and Stormy's Better Half

Bright & Breezy a.k.a. the dark and stormy's better half

1 oz dark rum (We used @lyondistilling)
1 oz ginger beer
1/2 oz Lemon Mint Element Shrub
Muddled watermelon
Fresh mint

Muddle 3 cubes of watermelon with fresh mint with crushed ice. Add rum, Lm shrub, ginger beer. Shake and strain into rocks glass with watermelon ice cube and fresh mint sprig.