Step 1 : Introduction to the question "To which country are tomatillos native?"
...Tomatillos are native to Mexico. They were first domesticated around 800 B.C. by the Aztecs. The tomatillo holds the distinction of one of the most ancient food-bearing plants. Tomatillos fruit has a citrus-like, sweet flavor and is an essential ingredient in many Mexican cuisine recipes. The tomatillo grows encased in dainty paper-like husks. The Aztecs actually grew two species of the tomatillo. One makes a tart green fruit that turns a pale yellow when ripe. The other produces a sweeter, purple fruit about the size of a marble. This species is commonly found growing as a field weed in Mexico. Source: GoodHousekeeping.com