How do I soften outside peel of limes?

To soften the outside peel of limes, you can microwave them for about 10-15 seconds, which helps to release the essential oils and makes the peel more pliable. Alternatively, rolling the lime on a countertop with gentle pressure can also help break down the outer layer. If you need softer peel for zesting or juicing, consider soaking the limes in warm water for a few minutes as well.