On the afternoon before their Passover Seder last spring, Liz Alpern and Shira Kline’s Brooklyn garden apartment was crowded with furniture that the couple had gathered for the evening ahead. A giant bowl of mole sat out on the counter, while in the fridge, packets of lamb stew meat were Jenga-stacked next to containers of homemade gefilte fish. Kline and Alpern, who co-owns the artisan Jewish food company the Gefilteria, had been planning the event for months. Invitations had been