Lemons - use it up

I have had 3 manky lemons sitting in my fruit bowl, leftover from Christmas. Today I decided to take action and get them used. I also have a biscuit tin with lots of odds and ends of biscuits, so I came up with a concoction of a lemon meringue with a cheese cake biscuit base.

My base was made up of 200g of digestive biscuits and a few shortbread biscuits whizzed up in the food processor into crumbs. These were added to 75g of melted butter then pressed into a loose base tin.

The filling was 4 egg yolks, 150g sugar, juice of 3 lemons, 300mls boiling water and a little lemon zest. I would have added a lot more zest but the lemons were a bit old and soft so made it difficult to zest them. I whisked all this together then added 2 tbsp of cornflour mixed with a little water. Brought this to the boil then poured it onto the biscuit base.

The 4 egg whites were whisked until stiff then I added 100g of sugar. I topped the tart with the meringue and baked for 25 minutes.

I baked it at fan oven 170C. I was impressed how high the meringue rose in the oven but it did settle on cooling.

It was a lovely lemon meringue but I would have preferred it a little bit tarter.  I would have been able to achieve this if the lemons had been a lot fresher. Anyway, the lemons got used and the old biscuits got used. Nothing was wasted so I'm happy.