a thin flat piece of food that has been cut off a larger piece
PEEL
to take the skin off fruit, vegetables, etc
to mix sth with short quick movements with a fork, etc.
CUT
GRATE
to cut something into pieces with a sharp tool such as a knife
SLICE
CHOP UP
to rub food against a grater in order to cut it into small pieces
to remove something or a part of something, using a knife.
BEAT
to be damaged and separated into two or more parts, as a result of force
BREAK