Apple Pie 3.5 Points

Ingredients
100 g flour
1 teaspoon white sugar
40 g polyunsaturated margarine, chilled, and cut up
2 tablespoon water, or more if necessary
4 medium cooking apple(s), peeled, cored and thinly sliced
50 g caster sugar
1 level tablespoon cornflour
1/2 teaspoon cinnamon, ground
40 g oats or oatmeal
40 g flour
25 g light brown sugar
40 g polyunsaturated margarine, melted

Instructions
1. Preheat oven to Gas Mark 6/400°F/200°C.
2. To make the crust, combine the plain flour and sugar in a large bowl or food processor. Add margarine and process (or mix together with your fingers if you do not have a food processor) until mixture resembles coarse meal. Add cold water, one tablespoon at a time, and process or mix until manageable dough forms. Press dough into the bottom and up the sides of a 24cm ( 9-inch ) pie plate. Pinch the edges to form a decorative rim; set aside.
3. To make the filling, combine apples, sugar, cornflour and cinnamon in a large bowl; toss to coat apples. Arrange mixture in prepared piecrust.
4. To make the topping, combine oats, flour, sugar and melted margarine in a small bowl; sprinkle over apples.
5. Bake until apples are tender and crumb topping is golden brown, about 45 to 50 minutes. Allow to cool for 30 minutes before slicing into 8 pieces.