Hmm, the onion Knights mead. Interesting possibilities with this one. Im still working on attempting to get a white liquid for the white walkers mead, im using almond milk and whole milk at the moment.
I guess I was thinking literally trying to boil and onion flavor into one.
I wouldn't, Here's a quote from a pretty old website.
"I know of a fellow who makes a wonderful mead flavored with toasted oak chips that he gets from a brewing supply shop. Really almost anything would work (though the onion mead one guy made was proof that NOT EVERYTHING is suitable)."