Line a 9-in. pie plate with pastry; set aside. In a small bowl, cream butter and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition. Stir in almonds and flour.
Spread into pastry shell. Arrange pear slices over filling. Bake at 350° for 25-30 minutes or until light golden brown.
For topping, in a large bowl, combine the flour, brown sugar and extract; cut in butter until crumbly. Sprinkle blueberries over pears; sprinkle with crumb topping.
Bake 25-30 minutes longer or until golden brown. Serve warm. Refrigerate leftovers.
Editor’s Note: If using frozen blueberries, do not thaw before adding to filling.