About green papayas
According to The Asian Grocery Demystified, green papayas are called muk qwa, or mu gua, and are simply the hard, unripe version of the yellow-green fruits commonly found in most grocery stores. Instead of luscious deep pink flesh and pearly black seeds inside, the flesh of the green papaya is pale green with tiny white seeds. Firm green papayas should be peeled and grated or shredded for salads and relishes. There are several varieties of papayas to be found in produce markets and grocery stores, however, true 'green' papayas are rarely available anywhere except Asian markets.