Upside-Down Mango Cake

Mangoes are the national fruit of India, where they have been cultivated for at least 4,000 years. Their cultivation had spread to southern Persia by the tenth century CE, and by the time of the Mughal ruler Akbar in the sixteenth century, mangoes had become a status symbol. These days they are mostly imported to Iran from India and Pakistan and continue to be popular both as fresh fruit and in the form of chutneys and pickles. You can replace the mangoes with guavas (locals call them za