This is a classic cocktail which utilizes a tasty Italian liqueur.
25ml lemon Juice
1/2 Egg white
Add the Amaretto and lemon juice to shaker with ice, reverse dry shake, double strain the liquid then add egg white. (the tin will already be cold and the egg white will emulsify better without the ice.)
Shake hard for a good 15 seconds, pour out cocktail into lowball filled with ice, add a few dashes of bitters.
Finally garnish with cherry and lemon wedge.