I had leftover lamb fat from making Scotch broth. I decided that oak cakes would be a good compliment to this stew. I use only a pinch of salt, because I am on a low salt diet. You may use as much as a quarter teaspoon. How much fat you may use is also a personal choice, you may use as little as one tablespoon. It is also not really necessary to brush them with fat, as I did, a Pam-ed baking sheet will work as well.