1 etrog 1 C water
1 C sugar
Peel and crush into small bits. Add peel, sugar and water into a saucepan and boil on high. After it starts to boil, lower to medium-low and let simmer. Marmalade is done when it slowly drips off a spoon. Place into a container and let it come down to room temperature.
Goes well on poultry or meat, or with peanut butter on toast.