Roly Poly
That could be his anglicisation of "roladka" A very nice dish, can take a few different forms. I'll put a pic of a roladka at the bottom.
Lopska? Lopatka is a cut of meat. Maybe it's that? There's also lobscouse (I'm not sure of the spelling) which isn't really very Polish but more round the Baltic including Germany. It's an old sailors' favourite so if he was ever at sea, that could be a possibility.
"Chumsch".
I was racking my brains and then suddenly started laughing when I realised something.
There's a Polish word czymś (pronounced chymsch). It means = "something". He was adding something and said so!