It’s Pork Roll - At least that’s what it was called in every diner from Somerville to Flemington back when they had the races at the Flemington Race Track!
(Can I get the recipe for a hard roll? - Last time I went to visit, I couldn’t even find a decent bagel)
Hmm.
There’s definitely a trend - Northern Jersey calls it “Taylor Ham,” while central Jersey (where I grew up) and South Jersey call it “pork roll.”