In many of my recipes I use black lemon powder. This tiny dried lemon is a staple pantry ingredient here in the UAE home. It is a key lime and is dried out in the sun and then used whole or in powder form in cooking for stews and mitchboos rice dishes. The dried lemon will either be black or brownish in color. I prefer to use the black lemons. If you live in the UAE or other Gulf countries then this is called Loomi Aswad and can be bought in either whole or powder form. If you live in the States, this dried lemon is available whole and can be bought at any Arab supermarket. When you get home just break a whole bunch of them open and take out the seeds and then grind them in a spice grinder.