Native New Englanders such as myself know about CHOW MEIN SANDWICHES
The chow mein sandwich is a hot sandwich, which typically consists of a brown gravy-based chow mein mixture placed between halves of a hamburger-style bun, popular on Chinese-American restaurant menus throughout southeastern Massachusetts and parts of neighboring Rhode Island. This sandwich is not well known outside of New England.
Growing up in the 1950s and 60s it was a staple on school lunch and summer camp menus. We still make it at home as an easy, quick meal..our grandchildren love it as an alternative to Sloppy Joes and it has much more vegetable and less meat.