Plum pie is a sweet variety of pie, topped with pitted plums and cut into halves or quarters, then baked in the oven.
Add halfway through cooking a mixture of milk, beaten egg, and sugar; it is a flan called pepele in Alsatian. Maybe in Alsace.
My plum pie app is originally a quetsch pie recipe also contains a lot of simple dessert recipes like:
Alsatian plum tart
Cinnamon plum pie
Plum tart and hazelnut cream
Plum tart with anise flavor
Laurent Marotte plum pie
plum pie crumble