1 quart canning jar(s) with rims and lids
Wash lemons in cool water to remove dirt and impurities
Sterilize jar in boiling water bath for 15 minutes before using.
Slice both the stem and bottom end off lemons. Starting at one end, cut the lemons in half lengthwise, but stop about ½ an inch before you reach the bottom. Repeat the cut perpendicularly so you have cut each lemon lengthwise in a "X" formation, but not all the way through; they should still be attached at the bottom, about ½ an inch.
If you are using several smaller jars, lemons can be fully quartered
Gently open each lemon with fingers
Spoon in ½ tablespoon (2 teaspoons) sea salt for each lemon
Place three or four lemons in the jar and press with muddler to release juices. A wooden spoon can be used for this step
Continue this process until all lemons are salted and juiced
Be sure the fruit is totally covered with their juices. Add more fresh squeezed or bottled lemon juice if necessary
Fill jar to the brim leaving about ¼ inch head space and seal tightly
Allow jar to rest at room temperature for 2 weeks before using
Lemons will last for up to 1 year if kept in a cool place and can be stored in the refrigerated after resting at room temperature for 2 months.