Whisk the yolk and sugar in a bowl until almost white

Boil the milk with vanilla essence

Whisk on to the egg and sugar

Add milk and whisk together with the whisked mixture of egg and sugar; mix well

Put the mixture in a cleaned saucepan and place on low heat.

Stir continuously with a wooden spoon until the misture coats the back of the spoon.

Pass through a fine strainer into a bowl

Freeze