125 g fresh lime juice
zest of 2 limes
2 eggs
75 g sugar (or up to 150 g, if wanted)
115 g butter, small cubes
In a bowl, mix eggs, sugar, lime juice and lime zest. Add the butter. Place the bowl over a saucepan with slightly simmering water. Whisk the mixture for 6-7 minutes or until it becomes thick. Remove from heat and pour through a strainer to remove the lime zest. Let cool (it will continue to thicken). Refrigerate.