1. Preheat oven to 400 degrees.
2. Combine bananas and lemon juice and let sit for 15 minutes.
3. Combine flour, sugar, butter and nuts and set aside.
4. Combine sugar, cinnamon and nutmeg and add to bananas.
5. Pour into pie shell and sprinkle flour mixture on top.
6. Bake for 35 to 40 minutes.