For the crust, blend together butter, maple syrup, cream cheese, egg, orange rind and vanilla. Add flour and baking powder. Roll out crust on a floured surface with a floured rolling pin. This dough is soft. Roll to 1 cm thickness. Fit or pat the dough into 18 cm pie plate. Cut apples into 0 cm slices and arrange in a circular pattern on dough in pie plate. Refrigerate half hour. Combine sour cream, maple syrup and lemon juice. Spoon over chilled apples. Sprinkle nutmeg on top. Bake at 180ºC or 30 minutes.