I want to dry some of the jalapenos in my garden so that they last longer.
Hang them in the sun like they do in Old Mexico.
slice your jalapenos 1/4 inch, like Larry said, then put them in an oven set to 1500
I dried some from a friends garden by slicing them about 1/4" and stacking them in my wifes dehydrator (similar to apples, tomatoes, bananas, etc). Her dehydrator is commercial (she dehydrates other things and found one at a garage sale) but I would assume the homebrew dehydrating strategies here would work well too. They were a little milder per slice (per weight/volume they were quite hotter) and lasted about a year. I know this is a pretty weak description since I only did it once, but it worked out rather well that time so it's at least proof of concept I suppose.
Oh, btw - if using a dehydrator soak the stuff in something like vinegar, soap or bleach water after. I soaked hers about 6h in soapy water with a good washing before and after and her next batch of bananas still had a little bite to them (which wasn't half bad, but not what she was aiming for), overnight in dawn w/ bleach and a little vinegar and another wash and it was safe.
perhaps wipe down with milk/wash - milk helps while you eat spicy stuff for breaking the bonds between the capcaicin (sp) and the taste buds...it might break the bonds with the plastic.