Preheat the oven to 120oc.
Place the egg whites into the mixing bowl and using an electric whisk, start to whisk.
Add in the cream of tartar and vanilla and continue to whisk until starting to form soft peaks.
Gradually add in half of the sugar a tablespoon at a time whisking between each addition.
Add in the green food colouring and continue whisking.
Continue adding in the rest of the sugar then whisk until forming stiff peaks and you have a smooth glossy mixture.
Spoon into a piping bag with a star nozzle fitted.
Pipe onto baking sheets lined with parchment then sprinkle over the Christmas sprinkles.
Place in the oven for around an hour then turn the oven off and open the door slightly, Leave for another hour before removing.
Allow to cool completely on the baking tray.
Sit on rolos to serve.