Lemon curd

Ingredients: 

4 unwaxed lemons, zest and juice
200g/7oz unrefined caster sugar

100g/3½oz unsalted butter, cut into cubes
4 free-range eggs

Method: 
  1. Put the lemon zest and juice, the sugar and the butter into a heatproof bowl. Sit the bowl over a pan of gently simmering water, making sure the water is not touching the bottom of the bowl. Stir the mixture every now and again until all of the butter has melted.
  2. Lightly whisk the eggs and egg yolk and stir them into the lemon mixture. Whisk until all of the ingredients are well combined, then leave to cook for 10-13 minutes, stirring every now and again, until the mixture is creamy and thick enough to coat the back of a spoon.
  3. Remove the lemon curd from the heat and set aside to cool, stirring occasionally as it cools. Once cooled, spoon the lemon curd into sterilised jars and seal. Keep in the fridge until ready to use.

made double the recipe but added 12 eggs (instead of 8) which makes the curd much firmer and can be spooned in to tarts etc.

20 lemons
500g butter
1kg sugar
22 eggs

and came out fabulous