Moroccan Preserved Lemons

• Scrub the lemons with a vegetable brush and dry them off.
• Cut off the little rounded bit at the stem end if there's a hard little piece of the stem attached. From the other end of the lemon, make a large cut by slicing lengthwise downward, stopping about 1-inch (3 cm) from the bottom, then making another downward slice, so you've incised the lemon with an X shape.
• Pack coarse salt into the lemon where you made the incisions. Don't be skimpy with the salt: use about 1 tablespoon per lemon.
• Put the salt-filled lemons in a clean, large glass jar with a tight-fitting lid. Add a few coriander seeds, a bay leaf, a dried chili, and a cinnamon stick if you want. (Or a combination of any of them.)
• Press the lemons very firmly in the jar to get the juices flowing. Cover and let stand overnight.
• The next day do the same, pressing the lemons down, encouraging them to release more juice as they start to soften. Repeat for a 2-3 days until the lemons are completely covered with liquid. If your lemons aren't too juicy, add more freshly-squeezed lemon juice until their submerged, as I generally have to do.
• After one month, when the preserved lemons are soft, they're ready to use. Store the lemons in the refrigerator, where they'll keep for at least 6 months. Rinse before using to remove excess salt.