It’s a shame that the standard way of learning how to cook is by following recipes. To be sure, they are a wonderfully effective way to approximate a dish as it appeared in a test kitchen, at a star chef’s restaurant, or on TV. And they can be an excellent inspiration for even the least ambitious home cooks to liven up a weeknight dinner. But recipes, for all their precision and completeness, are poor teachers. They tell you what to do, but they rarely tell you why to do it.