Chop the onion, dice the cheese and mash well with everything else with a fork while mixing. It goes easier when the cheese has already become a little bit warm, but still takes a few min. If the whole can rest another hour, the onions and the caraway seeds soak well.
Caution: Acute odor nuisance by Romadur possible!
Best fits to my taste a fresh (warm) giant pretzel to it !