Beis Shammai say that one may not give challah or other priestly gifts to a kohein on yom tov regardless of whether they were separated before yom tov or on yom tov but Beis Hillel permit it. Beis Shammai said, “Challah and gifts are a portion for the kohein, just like terumah. Just as terumah is not delivered on yom tov, neither are challah and gifts.” Beis Hillel replied, “Just because terumah – which may not be separated on yom tov – may not be delivered, that does not necessarily hold true for gifts that may be separated on yom tov.”
Beis Shammai say that spices may be ground on yom tov using a wooden pestle (as opposed to one of stone), while salt may be crushed in a jar with a wooden spoon (as opposed to with a mortar and pestle). Beis Hillel permit doing these things in their usual manners: with a stone pestle for spices and a wooden pestle for salt.