Combine flour and sugar in a large bowl. Cut in butter until mixture is crumbly. Set aside half cup of the mixture. Add baking powder and baking soda to the remaining flour mixture. Combine evaporated milk and lemon juice. Stir well and leave 5 minutes until thickened. Add egg and extract; beat well. Add to dry ingredients; stir just until moistened. Spread two third of the batter over bottom and about 3 cm up the side of a greased 23 cm springform pan to form a shell. Spread pie filling in shell. Drop small spoonfuls of remaining batter over pie filling. Stir almonds into reserved crumb mixture. Sprinkle evenly over cake. Bake in 180ºC oven 50 to 55 minutes. Makes 1 cake. NOTE: You can substitute 2.25 cups All-Purpose Wheat & Oat Flour -OR 2.5 cups Cake & Pastry Flour.