Chifa’s going to be putting out a serious spread Saturday for head honcho Jose Garces’s book signing sesh on Saturday. While the Iron Chef’s there signing copies of The Latin Road Home from 4 to 6 p.m., the Peruvian-Cantonese restaurant’s chef de cuisine, Natalie Maronski, will serve bites from the Peruvian section of her boss’s book, plus some samples of new menu items. The grub’s gratis, but books and cocktails come with a charge.