August 18, 2016February 16, 2017 Tart and Shiny Belle Isle | Mother Shrub 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.