American celebrity chef Andrew Zimmern described a bag of it as 'Vietnam in a bag' — a fitting tag for a snack that originated as a treat for school students.
Strips of rice paper are tossed by hand with green mango, dried beef or squid, dried shrimp, quail eggs, roasted peanuts, fried shallots, and a tangy tamarind dressing, all mixed to order in a plastic bag right before it's handed over. Vendors set up carts outside Saigon schools and universities where it's sold as an after-class ritual.