Elderflower liqueur, Aperol, Grapefruit Vodka, Lime juice
In a pint glass with ice, combine all ingredients. Shake and strain into a chilled cocktail glass. Garnish with an even layer of Orange-Ginger Foam.
Combine 3/4 cups orange juice, 1/4 cup skim milk, 2 oz Simple Syrup and 1 oz ginger liqueur to a blender. Blend for 5 seconds. Add 2 egg whites, blend for 2 seconds. Pour into a whipping container and use according to manufacturers directions.