Sourdough gets its start from the wild yeast in the air. Many contemporary recipes call for using packaged yeast, but the starter will develop a more interesting flavor without it. Jacqueling Higuera McMahan, a cookbook author who suggests using organic grapes. Their natural sugar helps feed the natural yeast to activate the starter. It takes 7 to 10 days to develop a good starter, but it can last you a lifetime. A range cook’s measure as a man was the quality of his sourdough biscuits. Many Texans still pride themselves on make these airy and slightly sour treats, though few follow the camp tradition of baking them over an open fire in a Dutch oven covered with glowing coals. If you don’t already have sourdough starter see the recipe.