Originally appeared in the Cenizo Journal, available online or by subscription at cenizojournal.com There is little so wonderfully refreshing as a salt-rimed margarita at the end of a hot desert day. Native to the Chihuahuan desert, the agave plant, sometimes called the century plant, is the mother of tequila and has been used in a multitude of ways for thousands of years. In Jalisco, Mexico, the agave is grown like a crop in row after row of large spiky plants. The