Ingredients:

Filling:
7 C peeled and sliced Granny Smith apples (about 5 C)
1/2 C sugar
2 t lemon juice
1/4 C flour
1/4 t salt

Topping:
1/4 C butter
1/4 C flour
1/2 C brown sugar
1/2 C uncooked oats
1/4 t salt

Other ingredients:
1  9-inch pie crust
1/2 C chopped pecans
Vanilla ice cream (optional)

Instructions:

Preheat oven to 375 deg.
For filling: Stir together all ingredients for filling, till well blended.
For topping: In separate bowl, cut butter into flour until mixture resembles small peas. Stir in brown sugar, oats and salt.
Fit pie crust into a 9-inch pie plate and allow edges to hang over the sides.
Pour filling mixture into crust and sprinkle topping mixture over it.
Lay edges of pie crust over the edges of the filling.
Loosely shield crust with aluminium foil.
Place pie on a baking sheet.
Bake at 375 deg for 25 min.
Remove foil and bake another 25 min or until crust is golden brown.
Sprinkle pecans over pie and bake another 5 min until pecans are toasted.
Let pie stand at least 30 min before serving.
May serve as traditional pie slices, or spoon over a scoop of ice cream in a bowl.