Hello GardenPreserver,
When garden fruit pies sink in the center, it is usually because the fruit releases too much moisture as it cooks, leaving empty space beneath the top crust, or because the filling wasn't thickened enough before baking.
To prevent this, you can follow these steps:
- Macerate and drain the fruit: Toss your garden fruit with sugar and let it sit for an hour, then drain off the excess juices.
- Use a reliable thickener: Cornstarch, tapioca, or flour helps bind the juices so the filling holds its structure.
- Vent the top crust: Ensure proper steam vents so pressure doesn't build up and collapse the center.
I hope this helps improve your homemade pies!