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Method
Make it happen
- 01
Heat oven to 170°C fan and line a 20 cm square tin. Rub butter into flour then mix in oats and sugar.
- 02
Press two-thirds of crumbs into tin and bake 12 minutes. Toss apple with cinnamon, lemon juice and walnuts.
- 03
Scatter filling over base, top with remaining crumbs and press very lightly.
- 04
Bake another 25–30 minutes until golden and apples tender. Cool completely before slicing into 12.