For the crust and topping:
For the strawberry filling:
I haven’t tested it, but coconut sugar should work in place of brown sugar.
I am not joking about allowing them to cool before cutting. They will fall apart. Let them come to room temperature in the pan, and then pull them out onto a flat surface and transfer them to the fridge until they’re completely cold.
Find it online: https://www.zenbelly.com/strawberry-oatmeal-bars/