160 - Lemon Juice
240 - Sugar
160 - Eggs
450 - Butter

Put the lemon juice, sugar and eggs into a bowl over simmering water (a la bein marie) once the butter has melted. whisk the eggs together then add to the mix on the heat. cook for 4 -5 mins until the mix begins to thickens. turn the heat off then allow the mix to cook out untill smooth and stiff.