These originated in Maine in 1902 at Amato's. They're now franchised throughout New England. I worked for Amato's for about 5 years and made plenty of them. Many people, fresh from the jetport, make it their first stop to get one when returning to Maine. You must use the exact ingredients or it won't come out right, although you can substitute the ham for genoa salami. Around here, we just call them Italians.