Beat the eggs until they are thick and lemon colored.
Add the sugar gradually and continue to beat till smooth. Add sifted flour and fold gently.
When the ingredients are thoroughly mixed (a smooth cake mixture), add the grated lemon rind and juice of the lemon. Stir gently.
Pour cake mixture into a paper - lined and greased or greased and dusted round / square baking dish and bake at 180 * C or 350 * F for 30 - 35 minutes or until golden color / skewer inserted in the centre comes out clean and also it leaves from the sides of the pan. Cool for a while before turning out onto wire rack.
Keep aside to cool for 45 minutes to one hour and cut into desired shape and size.