Originally Posted by craz

Its NOT so simple, Example taking a Kosher Hamburger patty and taking a slice of say Kosher Cheese (yep most cheese are not kosher), although each item in and of itself are Kosher once put together renders the total no longer Kosher.

So if there was a vegtable cart set up and the vegatables were NOT sliced, then maybe, once they are sliced there could very well be a problem due to the utensils that were used to cut them. So therefore a person who adheres closely to the laws of Kosher wont eat such items, sold by such a vendor.

The same might be the case for a Muslim since they wouldnt know if the knife had indeed been used to cut meat that they wont eat. (not 100% on this). Just as peopel wont eat a product if it was made in a plant that had say peanuts in it , if they are allegic to peanuts, not enough that the product itself didnt contain any for some they need to know that there werent any nearby at all, when the product was made.

So Egg Salad or Tuna Salad are also out of question, some would eat it since the egg or tuna itself OK, but most who adhere to the fullest when it comes to keeping Kosher wont.