Hello, I would like to know if a fleishig knife was used to cut warm eat and was immediately (mistakenly) used to cut bread that is dairy (it had cheese on it) what is the procedure with such a knife does one have to kasher it. It was used to cut onions but not in the same day.
Thank you for you time
A Gutten moed
If the knife was already cold – which appears to be the case, because it was only used with “warm” meat and was presumably not hot a short time later – there is no problem with the knife. Make sure you wash it off well, and also cut off the part of the bread that came into contact with the knife.