Belle isle moonshine – MOTHER shrub

Tart and Shiny

1 1/2 oz. Belle Isle Ruby Red Grapefruit Moonshine
1 1/2 oz. MOTHER shrub grapefruit shrub
4 oz. seltzer water

Serve over ice in a highball glass. Garnish with a grapefruit slice. For added oomph, add a splash of Prosecco.