I've heard a few commercials referencing these and didn't think they sounded appealing. Apparently, they aren't new, have quite a following and are increasing in popularity.

Mr. Lee nearly shouts when I ask if the corned beef egg roll could be southeast Michigan’s next staple. "As big as the coney dog! It will be up there and beyond, no doubt about it, no question about it! This is big stuff. I’ve got people coming in and they’ll order five, 10, 15 at a time."


http://www.seriouseats.com/2017/12/w...lty-maybe.html