Instructions: Given the background description of some cooking related query, summarize the question into a title
Input: I am making small pies (in muffin tins!) for a party. I plan on pre-cooking the filling (ground beef and veggies), then finishing the pies at the location. Would it be helpful (either for transport or for shortening the on-location cooking time) to par-bake the pie crusts in the tins?
Output:
When is is necessary to par bake a pie crust?