Ingredients:

35 ml acorn infused Grey Goose
25 ml Martini Bitter
15 ml St. Germain
15 ml Maple Syrup
35 ml Martini Asti

Method:

Stir first four ingredients in a mixing glass with ice cubes. Spritz with Prosecco. Add Ice shard to Collins glass and gently strain in liquid. Garnish with grapefruit zest coin.