Almost. It still feels weird somehow.
Peanut and jelly, I would consider that too simple to be a dish, but it's an emblematic pairing. Maybe if "fish and chips" were presented as an emblematic pairing rather than a dish, that would make sense. I mean, do you consider "hamburger and fries" to be a dish? Or is the hamburger, the dish? I certainly think of the hamburger as being a dish (or rather a template with many variations), and the fries to be the traditional accompaniment.
Meatballs are a prepared ingredient. One that you normally put on spaghetti.