Got kugel? Got Kugel with Toffee Walnuts? Now you do. Here's the real homemade Gefilte Fish? and also Salmon en Papillote. Grandma Sera Fritkin?s Russian Brisket and Hazelnut-Crusted Rack of Lamb. Aunt Irene's traditional matzoh balls and Judy's contemporary version with shiitak…