In a cocktail shaker, add the amaretto, limoncello, lemonade, and grenadine. Shake, and then pour into a rocks glass filled with crushed ice.
Cooks Note: The idea is to have it look like a snow cone, with lots of ice sticking out of the glass (just put some pressure on the ice) and pour the drink on top of the ice.
Garnish with a lemon twist.
Recipe courtesy of Guy Fieri