Overview: The tomatillo. It’s the source of much of the distinctive flavor of Mexican cooking. And also the source of much confusion. Rick takes us out to the garden to discover just what a tomatillo is and isn’t (hint–it’s not very closely related to a tomato), with tips on how to grow tomatillos, what to look for when buying them and how to judge their ripeness. He then makes a tangy Tomatillo Salsa Verde with onions, roasted garlic and serrano chiles that’s great with tortilla chips. In the free-associative spirit of the series, those corn chips inspire a delightful side trip to Mexico for a look at the role of corn in the culture and the garden. Back in Chicago, Rick turns roasted tomatillos into a sauce for a juicy Tomatillo-Braised Pork Loin and combines the elemental flavors of corn and tomatillos in a whimsical invention of his own, called Pescado Encornflecado–fried fish filets in a corn flake crust, served in a lively tomatillo sauce with sautéed fresh corn Esquites.