Aiutami a identificare questo cibo che ho mangiato

Probably just a Fleischpflanzerl (meatball?) in a Semmel (bread roll).

Could also be something entirely different, hard to tell as the place you got that from offers a lot of different sandwiches.

Probably from here: https://www.worldsoffood.de/specials/was-isst-deutschland/item/2559-luigino-s-sandwiches-muenchen-viktualienmarkt.html