To Prepare the Crust: Sift together the flour and baking soda into a large mixing bowl. Stir in the oats and brown sugar to the flour mixture before adding the butter and rubbing it together until ...

Method Crumble Combine flour, sugar, zest, salt, cinnamon and walnuts into a food processor. Pulse until combined. Add walnuts and process until chunky but still fairly nutty, about 3 pulses. Add ...