by Reb Gutman Locks
The Talmud warns; if onions or garlic are completely peeled, and their roots are also cut off, and they are left over night, they should not be eaten because they contain a “harmful spirit”. Wrapping them does not save them, but if they are mixed with other foods they are fine. There is a rabbinic authority that says if they were refrigerated overnight they are safe. This is the opinion that I heard many years ago, but as it turns out we are not to rely on this opinion. The bottom line is that in all cases, today peeled vegetables left overnight are not forbidden, and they may be eaten; however, there are those who say that even though they are permitted, they should not be eaten.