Tomato Watermelon Martini to be served at Tomato DinnerChefs and foodies, New Jersey and beyond, look forwardto that fine summer day when they could walk out into their garden and pick the first ripe tomato.   Few fruit are more delicious than a ripe, fresh, juicy, slightly sweet, somewhat acidic, sometimes mild, occasionally citric, umami rich, homegrown, vine-ripened, Jersey tomato.  The tomato, despite its savory nature, is classified as a fruit because it develops from the plant’s flowers, and grows to surround the seeds.