Lovely lemon curdy pudding

Preheat the oven to 200ºC/400ºF/gas 6. Cream the butter, sugar and lemon rind in a mixing bowl. Add the egg yolks and flour and beat in, then add the milk and 3 tablespoons of lemon juice and mix well.

Whisk the egg whites in a separate bowl until stiff, then add the rest of the mixture. Mix it all well but don't over-mix it; you don't want the air to come out of the egg whites. Pour into a buttered ovenproof dish, stand the dish in a roasting tin about a third full of water, then bake in your preheated oven for about 45 minutes until the top is set and spongy and it's a nice golden colour.