Is challah that is seperated from bread treif in chutz laaretz, or in Israel? Meaning, if one were to burn it in the oven and flip it with a fork, is the fork now treif? If it is treif, how should one burn it without treifing up anything else?
Challah is considered ‘treif’ both in Israel and outside of Israel, although its status outside of Israel is more lenient than in Israel. Therefore, the fork used to flip over the challah should be kashered by means of hag’alah. The best way to burn the challah is by burning it over a fire on a special gauze, or covering it with aluminium foil and placing it inside the oven until burnt. Note that if the challah was burned in the oven without being covered, the bottom surface of the oven (where the challah touched) will also be treif, and would require kashering. See also the comment, below.
Sources: See Shach, Yoreh De’ah 323:4.