I had delicious overnight oats in Reykjavik in Iceland, which I know you can get delicious overnight oats anywhere, but I don't know, something about the way they did it with like the raspberry compote at the bottom.
To make the compote you're going to put your apples in a heavy bottomed sauce pan, to that you're going to add some apple juice and some water, sugar, cinnamon, and a little bit of lemon zest.
Once your dough is all in your shell, you're going to take your cooled apple compote and spread it along the bottom of the tart shell, just until you have a single layer.