The prohibition applies only if the food is prepared exclusively by non-Jews.[5] A small amount of Jewish participation can suffice to keep the food kosher.[2] Different rabbis have different views on the absolute minimum: Sephardi poskim state that the minimum participation is to light the fire and place the pot on it to cook, while Ashkenazim are satisfied with merely lighting the fire, or even making a slight adjustment to a fire which was already lit by a non-Jew.[3]