A Sunday-night prix fixe at Babette’s restaurant on Newtown Lane in East Hampton, will be offered from 5 to 9 p.m. The cost is $19.95 and features a choice of turkey meatballs, barbecue tofu, steamed edamame, and crisp goat cheese dumplings, among other items, for starters, followed by entrees such as chicken mole enchiladas, vegetable pad thai, roast chicken, salads, and Atlantic cod. Dessert is included as well. On Saturday at Baron’s Cove restaurant in Sag Harbor, Matty Boudreau, the chef, will serve up a menu in honor of Oktoberfest from 1 to 5 p.m. Bratwurst, sausages, grilled corn, German-style pretzels, apple cider, seasonal brews, and more will be offered.