Citrus fruits like lemon, lime, orange, tangerine or grapefruit are wonderful ingredients for making your own flavored sugars.
This tutorial will show how to make lime sugar, to use in pastry, desserts and mohito's! :)
You can adapt this tutorial to make other flavored sugars, for example by using vanilla beans or cinnamon. http://www.instructables.com/id/DIY-Vanilla-sugar/