1 pack of digestive biscuits
70g butter, melted
1 (379g) tin sweetened condensed milk
Pre heat the oven to 180 ̊C / Gas 4.
Crush the biscuits to fine crumbs, then add the melted butter and mix. Press into the bottom of a tart tin by pressing the mixture with a glass or the palm of your hand.
Pour the condensed milk into a bowl, add the eggs and mix well. Zest one lemon and set aside, juice the 3 lemons and add the juice slowly to the milk while whisking the mixture will thicken. Add the lemon zest then mix.
Pour the lemon mixture over the base and bake in the oven for 10 minutes.
Cool then refrigerate before serving.