In a large measuring jug (2.5 litre) or mixing bowl with a spout, whisk the eggs with the lime peel (using the peel cuts through the 'eggy' taste) until pale and aerated
Whilst still whisking, pour in the condensed milk
Continuing to whisk, pour in the evaporated milk
Stir in the rum and the bitters
Sprinkle ground/grated nutmeg and stir through
Remove the lime peel and decant the mixture into sterilised bottles and keep refrigerated (it will keep for months)
Serve over ice
Keyword alcohol, Christmas, ponche a crème, ponche de crème, punch a crema