The Goldberg sisters cook mushrooms for the seitan Wellington they are making. (Lawrence K. Ho / Los Angeles Times)
An array of vegan spices, condiments and ingredients is laid out for the cooking demonstration. (Lawrence K. Ho / Los Angeles Times)
Vegan chefs Heather, left, and Jenny top a vegan green bean casserole with homemade bread crumbs. (Lawrence K. Ho / Los Angeles Times)
