How to keep cut lemons fresh

Here's a simple tip that really works! If you only need half a lemon for a recipe, wrap the other half in al-foil to keep it fresh. Sage and I have tried this with lemons and grapefruit; you can keep them in the fridge for at least a week and they are as good as the day you cut them. Too easy! – Pru

PS When you unwrap your lemon, re-use the foil for the next one.