1940's Clover Leaf Cocktail

1 lime
2 teaspoons grenadine
1 egg white
1½ teaspoons dry gin 

Shake well with cracked ice and strain into 4-ounce cocktail glass. Serve with mint leaf on top.

From the book: Old Mr Boston's De Luxe Official Bartender's Book compiled and edited by Leo Cotton (Ben Burke, Inc, 1941)