Cook over a low heat, stirring continuously, until thick and the mixture reaches 78C on a digital cooking thermometer. You’ll need to stir constantly, scraping the bottom of the pan so the eggs don’t overcook or burn. Add the lime zest, whizz up again with a hand blender, pass the mixture through a sieve into a jug and pour into six serving glasses, ramekins or one large dish. Cover with cling film, then chill for at least 3 hrs, but preferably overnight, until set. Remove from the fridge and sprinkle with the dates, honeycomb, pistachios and banana chips to serve.