Instructions:

1. Mix all ingredients together, adding grated lemon rind and juice and salt and pepper to taste. Roll the mixture into balls about the size of walnuts and put them, a little apart, in a greased baking tin.
2. Bake them for about 25 minutes in an oven preset to 190 C/375 F/Gas Mark 5, turning them after about 15 minutes so that they become crisp all over.