Get out your coffee grinders!
Time to save everything we can to save money. Wash your oranges (or lemons or limes) first. Then peel the orange. Try to keep the peel all in one piece. Then just lay it out on the counter or table and let it dry thoroughly.
When dry, tear the orange peel into pieces that fit into your coffee grinder. Grind the peel into powder. And shazaam! You have the strongest, tastiest, greatest orange in the world. Best part is, you didn't waste a thing from your fruit!
I make mine into (among many other things) a great orange pekoe tea.