I made one a few weeks back, made it up as I went along!
Chopped up a dozen or so chillis coursely and put them in the preserving pan. Had a bucket full of windfall apples, peeled, cored and cleaned then up and chopped them coursely, weighed them, and plonked them in the preserving pan with some water - not enough to cover, but enough to go up about half way. I brought this to the boil, then let simmer for about 40minutes until the apples were very very soft. I then used a potato masher and gave the mush a really good bashing to get maximum flavour from the chillis. Now if you want jelly, you could now pass this mash though a jelly bag, I didn't bother as I wanted more of a jam. Then, for every pound of apples I used, I added a pound of sugar, brought this to a rolling boil and bubbled until it reached setting. HOWEVER - apples and sugar catch so very very quickly so you can't afford to leave it. Mine did almost catch so turned a honey colour, which I didn't mind at all! ONce setting was reached I poured it into sterile jars, poked a whole chilli in the middle to look sexy, sealed and labeled!
Hope this rambling helps. ;D