Given the task definition, example input & output, solve the new input case.
Given the background description of some cooking related query, summarize the question into a title
Example: I recently attempted to grill duck legs on my propane Webber. I was afraid of flare-ups due to the high fat content in the duck meat so I grilled with somewhat low and indirect heat. It took a long time, but I got them looking lovely and brown and not burned. The only problem was this: they were tough and didn't taste very good at all. Clearly I did something very wrong. Any advice?
Output: Tips for grilling duck legs?
A person gives a detailed description about grilling duck legs and the process they followed for the same. However, at the end the duck legs did not turn out well, so the person wants tips about how to properly grill duck legs. The question is summarized as Tips for grilling duck legs? for easy indexing next time someone searches for a similar query

New input case for you: 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?