Babette’s restaurant in East Hampton is offering a $21.95 prix fixe dinner from 5 to 9 p.m. on Sundays. Need ideas for Thanksgiving celebrations? The Highway Restaurant and Bar in East Hampton can provide all the side dishes and desserts needed. All you to do is prepare the turkey. The Scarpetta Beach restaurant at Gurney’s in Montauk will be serving a four-course Thanksgiving prix fixe next Thursday from noon to 8 p.m. A children’s menu will be offered, as will activities for children between noon and 4 p.m., allowing parents to sit back and enjoy a holiday respite.