First off, in an electric mixer, beat the egg whites, xylitol and vanilla essence until creamy like.
Add the zest and coconut and fold it into the egg white mixture.
Using a dessert spoon, and some water to wet your fingers, shape your macaroons and carefully transfer it to a sheet of parchment paper, lining out your baking tray.
Bake at 160 degrees Celsius for about 15 -20 minutes, checking every now and then to ensure even baking.