If I was after a "food safe" finish I'd tend to go for the Chestnut one of the same name, although I think you get a better finish from e.g. tung oil. I know that tung oil is claimed to be non-toxic, whereas linseed is labelled as harmful (covers a multitude of sins and might just mean don't drink it straight from th ebottle or have a bath in it).
I expect that if it's good and dry (might be a few weeks?) you are unlikely to come to any harm at all, but maybe not ideal if you're planning to sell stuff on a well suited to food use.
Cheers,
Dod