SHAKE all ingredients with ice and fine strain into chilled glass.
Dust with grated nutmeg
Easy-drinking but complex with a herbal edge.
Created by yours truly (Simon Difford) and named after the Greek for 'elixir of life, the food of the Gods.' However, in Britain, Ambrosia is a brand of custard, so advocaat seemed appropriate. And if there is a God, he/she/it surely drinks Chartreuse.