brown. the crust will bubble a little during baking.
5. let the crust cool for 5-10 minutes while preparing the filling.
6. in a large mixing bowl, stir together all the filling ingredients. pour evenly over the crust and bake for 12 minutes.
7. remove from the oven and add walnut-sized pieces of the remaining oat mixture over the filling. it will be a very thick layer and some of it will sink a little into the filling. bake for another 30 minutes or until the filling is golden brown and firm and the middle is set.
8. let cool for 1 hour and serve with whipped cream or maple caramel sauce.
* to make 