Ameretto sour

My favourite cocktail on a night out has got to be the ameretto sour. 
It's such a sweet and sour drink, it appeals to everything I love in a drink and the best bit is, it's super simple to make. 

What you will need:
50ml ameretto
25ml lemon juice 
*shake well with ice and strain over crushed ice*
Serve with a cocktail cherry and a twisted lemon slice