Salt-cured lemons...
First wash the lemons--actually, you really should scrub them well if they came from a store.
Cut into quarters, but don't all the way through so they're still connected.
Pack coarse salt into the cuts, close up the lemons and put them in a large jar.
Pack more salt around them as you put them in the jar.
Check them in a few days to see how much juice has been released--it should cover the lemons so if not squeeze more fresh lemon juice onto them to cover. Set the jar in a sunny spot. Every day you should turn the jar upside down to redistribute the juice.
They should be ready to use in about a month.
PS don't throw the juice out!!! You can use it for marinades and vinaigrette.
And speaking of salty lemons, Martha's salty lemon/ salty buttercream cake is supposed to be sublime...