Freezing lemons allows you to preserve their tangy flavor for about four months, and the freezing process softens the fruit, making it easier to juice and zest.
Finally, place the lemons in a freezer-safe bag, removing as much air as possible before sealing. Freezing them whole is easiest, but you can also cut them in halves or slices.
For zesting, you can grate the lemon while it's frozen, but for aesthetic slices, thawing is important. For recipes like roasted chicken or fish filets, use the lemons frozen.
Frozen lemons can also be used for cleaning. Freezing breaks down the lemon's structure, making the juice more potent and effective at cutting through grease, stains, and odors.