Epidavros Sour

Name: Epidavros Sour
Ingredients: 1 2⁄3 oz Tanqueray London Dry Gin; 1 oz Lemon juice; 2⁄3 oz Honey syrup; 1⁄3 oz Egg white (pasteurised) or 3 dashes Fee Brothers Fee Foam cocktail foamer; 1 sprig Lavender