Photo: GetYourGuideThis small-group food tour is a delicious shortcut into Mexican cooking, wandering the Centro for seven tastings from street tacos and quesadillas to moles and a secret dish, with a guide who knows the stallholders by name. Come hungry and pace yourself, as the portions add up quickly. It is as much a lesson in history and daily life as it is a meal, and you will leave with a list of places to return to.