I love to pack my pies with fresh fruit. That being said, there is a lot of moisture that will cook out of them. The cornstarch is in there to thicken everything up, but needs time after the pie comes out of the oven to completely set. I sliced my pie after 2 hours on the counter and 2 hours in the fridge to take photos. While the slices held up beautifully with no sagging, those juices are able to set even more if you give your pie a whole night in the fridge.