Perhaps the most lauded chefs on an island of lavishly praised chefs, Amanda Lydon and Gabriel Frasca run the elegant Straight Wharf beside Nantucket Harbor as a sort of chef’s restaurant, a place where foodies flock for the best of the best in creative cuisine. The menus change nightly, adjusting to what’s fresh at the market. In contrast to come of the other Nantucket restaurants, this food is neither heavy nor overly rich. You might begin with a butter pear and celery salad and continue with the seared Nantucket fluke with island vegetables and garden herbs, adding on pan-roasted broccoli rabe and heirloom grits. Finish the meal off with a chilled melon soup with a cantaloupe sorbet. See what I mean? Ethereal.