Now that farmers’ market season is in full swing we are spoiled by an abundance of fresh produce. Lettuces, summer squashes and radishes cram the stalls of just about every green market. Sold in a variety of rainbow colors, radishes are especially plentiful, and they’re almost always sold with their greens attached. Most Americans, however, routinely ask the vendors to cut off the greens or they discard them at home. It’s unfortunate because these greens are delicious and nutritious. In northeastern China the slightly peppery leaves are used in many different ways, including in stir-fries, salads and steamed buns.