Here's a recipe, borrowed from the Greeks, that offers a marvelous way to bring out the goodness and tang of fresh vegetables. They're simmered until just crisp-tender in an herb/wine/lemon juice marinade. The result is wonderfully savory, as well as healthful. Carrots, mushrooms, green beans, leeks and zucchini, artfully arranged on a platter, make a dish both pretty and tasty. Served hot, it will complement any meal. Served cold, it's a pleasant appetizer.