Caldo Tlalpeño is a deliciously nutritious chicken and vegetable soup, perfect for chilly days, served with fresh cheese and chipotle chili pepper on top. And avocado, if you've got some!This dish is originally from Tlalpan, Mexico, one of the 16 administrative alcaldías or boroughs of Mexico City. It is the largest borough by area but most of it is forested rather than urban. According to