Balsamic and Fresh Strawberry Cocktail

Ingredients for the cocktail:
3 to 4 medium strawberries
1 ounce balsamic vinegar
2 ounces gin, such as Hendrick's
ice
foam

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Ingredients for the foam:
1/2 cup egg whites
1/2 cup elderflower liqueur, such as St. Germain
juice from 1 lime

Preparing the cocktail:
Muddle the strawberries with the balsamic vinegar, and then add the gin. Add ice and shake and strain into a rocks glass with ice. Top with foam.

Serves 1

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Preparing the foam top:
Add the egg whites, liqueur and lime juice to a nitrous oxide cream charger (a cream charger, not a soda charger). Shake, then double charge with 2 nitrous oxide chargers.

Makes about 1 cup