1/2 oz Wray & Nephew White Overproof Rum
1/2 oz Benedictine
1/2 oz Passion Fruit Syrup
1/2 oz Lime Juice
Build in a Collins glass, fill with crushed ice, and swizzle to mix and chill. Add a straw, float 1/4 oz Fernet Branca (photo shows 1/2 oz which is for braver folk and 1 bsp might be better for others), and garnish with a citrus peel boat. Adding the straw before floating the Fernet Branca makes for a clean first sip.