Preservation Shell has a habit of saving scraps. Onion tops, garlic ends, herb stems and potato peels all make excellent, delicious vegetable stock for what amounts to being free.

Some of the scrap saving includes citrus peels. Juicing a lemon or lime? Throw the rind in a bag and freeze it. Want to eat an orange? Add that peel to the bag. After a little while you'll have yourself enough material to make mixed peel marmalade. Mixed peel marmalade will be very tart and flavorful, more like British marmalade than American. Mine turned out a deep earthy orange color.