Not only can can you dehydrate almost any fruit scraps for tea, but vegetable scraps can be used in soups and stocks, and some can be regrown (see Growing Celery From Scraps).
The article excerpt below is from wikihow.com, and has several links to recipes and how-to's for candied peels, brandy, etc...
Citrus peels can be used in myriad ways instead of simply tossing them out or
composting them. In a household that consumes many oranges, lemons, grapefruit,
tangelo, and other citrus, making use of the peels can save you money and
produce some wonderful results. This article presents a few suggestions to get
you started.
Always wash the peel extremely well before use. If possible, prefer organic
sources rather than those which have been sprayed, especially for any food or
internal use. If you can't get organic fruit, use a very good fruit and
vegetable scrub to remove chemical traces.
There are many types of citrus, including orange, mandarin, kumquat, grapefruit,
lemon, lime, pummelo, citron (citrus apple), tangerines, etc.
LEMON - There are so many potential lemon peel uses that entire chapters in books have
been devoted to it.
- Peel a lemon and use it to bathe yourself in the shower. It leaves your body and
hair smelling fresh and clean.
- Citrus peels such as peel of lemon work well for roasting chicken. Put peel into the chicken and roast. You will find a great smelling and good tasting chicken.
ORANGE -
with the brown sugar.
(Of course my contribution here is to dehydrate them and use in medicinal teas)
OTHER USES FOR CITRUS PEELS:
the refrigerator. Now you can enjoy the taste of water even more.
for the kids.
peel.
Read the entire article here...http://www.wikihow.com/Use-Citrus-Fruit-Peels-in-the-Home-and-Garden