A sweet or savory dish made with a crust and filling (such as fruit, pudding, meat or vegetable). Pies can have bottom crusts only, or top and bottom crusts or, as with deep-dish pies, only a top crust. Sweet pies are generally served as dessert and savory pies as the main course or appetizer. Crusts can be made of a variety of mixtures including short crust pastry, puff pastry, cookie crumbs, meringue and even, as with shepherd's pie, mashed potatoes.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.