Ross Reynolds interviews food writer Sara Dickerman about an early green offering in the farmers market: stinging nettles. They really do sting, but Dickerman explains how to handle them and make a delicious pesto that's distinctively different from basil pesto. You can pick them in the wild or get them at farmers market through May.
Pick Up (Carefully) Stinging Nettles In Your Farmers Market

Flickr Photo/J Brew (CC BY SA 2.0)/https://flic.kr/p/4SPejs