Even when you're baking a treat you can make healthy choices. This apple pie is full of whole grain goodness, and as an added bonus you'll find that the oat and whole wheat crust is easier to make than a normal pie crust.
Whisk the flour, rolled oats, brown sugar and salt together in a large bowl. Add the oil and mix well until evenly combined. Add the water and stir until the mixture comes together. Knead once or twice to gather up any extra dry ingredients. Add a few more drops of water if needed. Divide in half and form into two flattened discs. Chill until ready to use.
Toss the apples with the brown sugar, flour and cinnamon.
Flour your hands, the work surface, a rolling pin and the dough, then roll out one pastry disc into a 12-inch (30-cm) round and fit into an 8-inch (20-cm) pie plate. You may find it easier to fold the disc into quarters, then pick it up and unfold it over the pie plate. Add the apples.
Roll out the second disc into a 12-inch (30-cm) round and place over top of the apples. Trim and seal edges and poke three or four vent holes into the top of the pie so that steam will be released and not blow out the crust. Place apple pie onto the bottom rack of the oven and bake for 1 hour, until whole grain crust is golden and juices are bubbling.