5.a. The following rules apply with regard to food which
1) grows from the ground and
2) is made from material that has previously been broken down or from separate crystals or particles that have formed into a block,
such as lumps of sugar or baked foods made from ground grain.
5.b. One may regrind, crush or crumble such food on Yom Tov, provided it is required for that day of Yom Tov, and one may even do so
1) in the manner usually adopted on an ordinary weekday and
2) with the aid of a specially designed instrument (other than an instrument normally used to prepare food for several days ahead).
5.c. See paragraph 7 below for use of a kitchen mincer or grinder.
5.d. After the food has been ground, crushed or crumbled, those pieces which have not been properly broken down should not be picked out by themselves, due to the prohibition against selection, but one may remove them together with a little of the ground food.
