Whisk together eggs, maple syrup, melted butter, applesauce, and lemon juice until emulsified.
Add flour or tapioca starch and whisk vigorously until thoroughly combined.
Pour the filling into prepared pie crust.
Bake 45 minutes or until the middle is set and the crust is golden brown.
Allow to cool to room temperature before slicing.
Applesauce Custard Pie https://traditionalcookingschool.com/food-preparation/recipes/applesauce-custard-pie/