I wash and dry fresh lemons. Cut them into wedges and de-seed them. Toss them into a freezer proof bag or container.
Whenever I need a lemon in my drink, I add the frozen wedges. No need to thaw, use them frozen. If you need lemon for cooking/baking, take the wedges out of freezer and let thaw a bit.
By it's.only.me from PA
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I use a lot of cut lemons but hate having a cut lemon half hanging around in my refrigerator until I use it again. Recently discovered that I can roll it gently (to release the juices) then pierce the lemon with a skewer. I just squeeze out the juice for a particular recipe I need, leaving the skewer in place when returning it to the refrigerator until the next time!
Fresh lemons can be stored long term by packing in sand. Just make sure no two lemons are touching.
I have my best results keeping lemons fresh (even halved) by wrapping first in good paper toweling, and then in wax paper, and keeping them in my fruit bin.