2 oz of Gin
1/2 oz of Herbal Liqueur
1/2 oz of simple syrup
3/4 oz of Lime Juice
2 sprig of mint
1 oz of Tonic water
1 oz of club soda (or clear soda)
1 dash of Peychaud's Bitters
Build in a shaker, add mint sprig, shake briefly. Strain over fresh ice in a collins glass, top with equal parts tonic and soda water, about an ounce of each. Garnish with other mint sprig and float Peychaud's on top.