Preheat the oven to 350°F. Combine the flour and sugar in a large bowl. Cut in butter until mixture is crumbly. Set aside 1/2 cup of the mixture. Add baking powder and baking soda to the remaining flour mixture. Combine the evaporated milk and lemon juice. stir well and put aside for 5 minutes until it thickens. To that mixture, add the egg and almond extract; mixing well. Add to dry ingredients; stir just until moistened. Spread 2/3 of the batter over bottom and about 1 inch up the side of a greased 9 inch spring form 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 350°F oven 50 to 55 minutes.