My wife and I (well, mostly her, I just helped a little then stayed out of the way) made etrog jelly today. After Sukkot was over, we collected 6 etrogs from different people at the shul, and along with two navel oranges, we made a batch of 13 jars of jelly. We did this last year for the first time, and it was a hit! We only made 6 jars then, and they went quite fast. This year, as you can see below, we ended up with a lot more. Now it remains to be seen if it all turns out as it should. Worst case scenario, we have etrog ice cream topping!