Try Delia's delicious lemon cake recipe filled with homemade lemon curd. Equipment and preparation: You will need to grease two 18cm/7in sandwich tins 4cm/1½in deep, lined with baking parchment, also greased.
This is a great sponge recipe, but i just double the plain flour and add half a tsp of baking powder. Its great with a bit of coffee powder too. This time i separated the eggs, beat the whites with sugar until stiff and then added the yolks back, this works really nicely.