Mix together flour, sugar, and butter until you have a nice crumbly dough.
Press into 8 x 10 or 9 x 9 dish.
Bake for 20-30 minutes. ( If your oven temp runs low you may need 30 minutes as I did in my old oven)
Cranberry Sauce:
Finely chop cranberries in a blender or food processor.
Put cranberries, maple syrup, and ginger in a sauce pan.
Cook on medium to high heat until thick, approximately 15 minutes.
Take off burner and let set while mixing the topping.
Topping:
Mix together, oats, maple syrup, and butter until crumbly.
After bar is baked:
Spread cranberry filling evenly over.
Spread topping over cranberry filling.
Bake an additional 15 minutes or until crumble top is lightly browned.
Let cool completely before cutting.
* I use salted or add 1/2 teaspoon salt. I recommend my favorite Kerrygold. It makes this buttery crust turn out the best! Please note using Kerrygold may also increase the baking time for the crust.