Preheat oven to 400ºF.
In a bowl, mix together one jar of pie filling with sugar, set aside.
In a separate bowl, mix flour, brown sugar, and butter using a fork until the mixture resembles coarse crumbs.
Fill each cavity of tart shells with prepared pie filling, topped with crumb topping.
Bake for 25-30 minutes, or until toppings are golden brown.
Let cool for 15 minutes before serving.
*Sweetener Options – adjust sugar amount or sweetener type, based on your liking.
**Flour Options – can be substituted cup-for-cup with all-purpose flour.