About two dozen members of the Conservative Synagogue of the Hamptons in Sag Harbor celebrated their new cookbook recently with a “Munch ’n’ Brunch” at the home of Marcy and Emil Braun in Bridgehampton. In attendance were many of the women and men who provided the recipes, who brought tastes of dishes including flourless gateau de mousse chocolate, mushroom quiche, Aunti Gertie’s apple pie Canarsie, and Egyptian charoset.