Grappa Sour

• 2 oz Grappa
• .25 oz Fresh Lemon Juice
• .75 oz Fresh Lime Juice
• 1 Egg white (optional)
• Angostura bitters

Shake all ingredients together without ice if using egg white.  Add ice to shake and shake vigorously.  Strain into coupe glass and garnish with 2-4 drop of Angostura bitters on top of drink.