If a vegetable is eaten raw only if it is in a salad, what bracha should I make on it if eating it plain? As one example, cabbage is usually eaten raw only when it is mixed with mayo, as in cole slaw, or other dressings as in red cabbage salad. I would assume, then, that you would say "ha'admah". (Let's assume the coleslaw has no carrots or other veggies, so the adamah is not for the carrots.) So, if I eat a plain piece of raw cabbage, should I say "ha'admah" as well?
Shulchan Aruch 202:16 reads:
However, this seems not to be quite as broad in practice as it sounds. Mishna B'rura :79, for example, notes that the no-b'racha on dried pepper and ginger is because "there's no pleasure from them at all". In contrast, SA 204:1 includes plain salt as something a b'racha is said on (Mishna B'rura there says it's "because one has a bit of pleasure"), and Mishna B'rura 204:24 includes some vinegars.
Those are some sources. For a practical ruling, as always, consult your rabbi.