Pectin is the jelling agent that many fruits have and that makes them good candidates for jelly and jam. Apples and quince are high in pectin, while others, like pears and some berries, have very little. So when you want to make a firm jam you either have to add commercial pectin or pectin jelly from another fruit.
Some artisan jam makers (notably June Taylor) make their own pectin. At Lindy's Toast, Lindy shows how easy it is to make apple pectin jelly - it just takes a few unripe apples, some sugar and a lemon.




I made Apple Jelly last year for the first time and we loved it. I need to make some more up this year as we are out.
view Laura @ Laura Williams' Musings's profile
The Lindy's Toast article is great. If you want to see more detailed photos of the gelling test, I've posted some to my website.
view Amy at Half Pint Harvest's profile