• A Sharp Food Item

A Sharp Food Item

1. A food item does not usually receive the absorbed taste of a utensil when used cold and not in a hot, or cooking situation.
2. The exception to this is a knife when pressed against a sharp food item i.e. radish, onions. This will transfer the taste into the onion, etc. example: if one cuts an onion with a meat knife the onion is considered "fleishik".
3. This is a result of the combination of the force of the knife and the sharpness of the food. In fact, this also overrides two major rules of kashrus.
a. Usually a utensil not used for 24 hours loses its effectiveness, i.e. the taste becomes "stale". Here however, we say the sharpness revives the "stale" taste and presents a problem even after 24 hours.
b. Usually the fact that the meat taste has gone through two transfers and has not combined with milk weakens its ability to cause an item to be fleishik but here we consider it as the original taste.
4. We therefore may not eat the onion with dairy. The same, of course, applies in the reverse.
5. If the onion was cooked with a dairy item, the Halacha depends on the proportions.
6. The Chochmas Odom introduces a variation of the Halacha If one cuts an onion with a parve knife against a "fleishik" utensil, the onion becomes "fleishik". This, of course, is a variation of the original Halacha in which case the taste originated from the knife.
7. In the following three situations there is a controversy in the poskim as to the Halacha
a. If the onion which received the meat taste was cooked with a parve item which, in turn was mixed into dairy, does this present a problem or not? In this case, there are 3 transfers 1) meat into the knife 2) from the knife into the onion 3) from the onion into the parve item.
b. An onion was chopped with a fleishik knife and placed into a parve blender or food processor - does the onion emit the taste into the utensil similar to its ability to absorb from the knife, or is this case different?
c. The fleishik onion was cooked in a dairy utensil. What is the halachic status of the onion and the utensil?