Labor Day has come to signify the end. No more white pants. Kids go the "Billy Madison" route and head back to school. And summer's just generally considered over. A number of D.C.-area restaurants, though, aren't quite ready to turn their backs on heirloom tomatoes, watermelon, corn and other fresh seasonal ingredients. As long as chefs can get their hands on these hot-weather staples, they're serving summery dishes for just a bit longer. That means for the next few weeks, here are some last tastes of summer to tide diners over before the onslaught of pumpkin and autumn.