- STEP 1
Grate the lemon/orange rind into a bowl and then extract the juice.
- STEP 2
in another bowl, whisk the juice and eggs together, then pour this mixture over the sugar and combine.
- STEP 3
Add the butter, cut into small cubes over a pan of barely simmering water. Stir frequently until thick and creamy and coats the back of a wooden spoon.
- STEP 4
Take off the heat and leave to cool before using as desired.