Rind ; one lemon FOLD altogether and put in baking dish to cut into squares after it set up, or in a graham cracker pie crust. Place in refrigerator for at least dozen hours. If it doesn't set up well, freeze for about half hour. I've had it set up beautifully at times, and at other times really be too runny to be pretty! A sprig of mint on top makes it especially good to look at.