Boil a small amount of water in a medium sized saucepan.
Juice and Zest 3 Limes
Blend together Pinch Salt, 100g Sugar and Lime Zest
Add blended sugar mixture, Juice of 3 limes, 50g Unsalted Butter and 2 Large Eggs to a heatproof bowl over the saucepan of simmering water.
Slowly whisk the mixture as it melts and combines
Continue to stir over the heat until the mixture thickens. When the curd is thick and creamy and coats the back of a spoon it is ready
Pour into a clean container and leave to cool completely before covering and refrigerating.