| Ingredient | Amount |
|---|---|
| Light rum | 1 oz |
| Port | 1 oz |
| Lemon | Juice of 1/2 |
| Powdered sugar | 1 tsp |
| Egg | 1 egg white |
| Carbonated water |
Shake all ingredients (except carbonated water) with ice and strain into a highball glass over two ice cubes. Fill with carbonated water, stir, and serve.