Question

The pattern of criss-crossing strips of pastry on top of food is called a what?

Answer 1

The pattern of criss-crossing strips of pastry on top of food is called a quadriller. It can be done with the back of a knife such as fish, scallops, etc. Examples include: meat on the grill or criss-cross strips of pastry on top of a pie.
 The goal of the pattern is to improve food presentation and make it look more interesting.