About five years ago, artist Frank Meuschke was exploring a Minneapolis farmers' market when he came across a stand selling bundles of mysterious looking greens for a $1 each. The greens were pea shoots and the farmers selling them were Hmong people, a minority group from China and parts of Southeast Asia. Although the leaves and tendrils of pea plants are less well known in American cooking, they are popular in a number of different Asian culinary cultures. Now is the time to get them at the farmers' market.