Crusty meal is a term used to describe a type of food that has a hard, crunchy outer layer. The two most common examples of this type of meal are potpie and PIE. Potpie is a dish made with a crusty pastry shell filled with a savory filling of meat, vegetables, and gravy. PIE is a dessert made with a crusty pastry shell filled with a sweet filling such as fruit or custard. Both potpie and PIE are popular dishes that can be enjoyed as a main course or a dessert.