We have so many lemons at the moment that I am always looking for recipes to use up the lemons.  I have never had key lime pie before. I decided to bake the pie substituting the limes with lemons.

Here is my recipe:

• 300g Tennis biscuits
• 150g butter, melted
• 1 x tin of condensed milk
• 3 medium egg yolks
• finely grated zest and juice of 4 lemons
• 300ml cream
• 1 table spoon of icing sugar
• extra lemon zest, to decorate

1. Heat the oven to 160C. Crumb the biscuits in a food processor, I put it in a bag and I hit it with a wine bottle – I think the food processor is more civilised, but more washing up to do. Mix with the melted butter and press into the base and up the sides of a loose-based tart tin. Bake in the oven for 10 minutes. Remove and cool.
2. Put the egg yolks in a large bowl and whisk for a minute with an electric beater. Add the condensed milk and whisk for 3 minutes then add the zest and juice of the lime and whisk again for 3 minutes. Pour the filling into the cooled base then put back in the oven for 15 minutes. Cool then chill for at least 3 hours.
3. When you are ready to serve, carefully remove the pie from the tin and put on a serving plate. To decorate, softly whip together the cream and icing sugar. Dollop or pipe the cream onto the top of the pie and finish with extra lemon zest.