Add the strawberries, maple syrup, lemon juice, chia seeds, and cornstarch to a saucepan and simmer for 5-7 minutes over medium-low heat.
Combine all the ingredients for the dough.
Line the baking dish with parchment paper.
Transfer 3/4 of the dough into the dish.
Press gently with your fingers to form the bottom layer.
Pour the strawberry filling over the crust.
Crumble the rest of the dough on top.
Bake at 180 C for 25 minutes.
Let the bars cool before cutting and serving.
Notes
Let the strawberry filling cool slightly before assembling, and cool the bars completely before slicing for clean, neat squares. Store in an airtight container in the fridge for up to 4 days.