there's loads of livercake recipes on the internet, but as a rough guide i usually buy 2 or 3 packs from Asda, liquidise it (you will need a strong stomach for this, smell is yuk) add to eggs, couple of cloves of garlic, grated carrot (or other veg) optional, then mix it with flour until it is slightly thicker than sponge cake texture. then just bake for 20 - 25 minutes. You can replace some of the liver with kidney (or i supposed you could make Kidney cake!)