By Evan Dawson, Finger Lakes EditorPhotos by Morgan Dawson Photography Most restaurants do not have to endure the uncertainty of a zealous owner who might show up at any moment with a truckload of summer vegetables, picked only hours before. At the Blue Heron Cafe they're getting used to it. "It's pretty entertaining, actually," says Heron Hill Winery's marketing director Kitty Oliver over a plate of the mahgarita flatbread pizza. "(Owner) John Ingle is so excited this time of year. He might drive in with a load of corn and say, 'Here you go!' And the staff finds a way…