1. In a large bowl combine the flour, 3 TBLS sugar and salt; cut in butter until crumbly. In a small bowl, whisk egg yolks and lemon juice; stir into dry ingredients with a fork. Remove 1 cup to another bowl; stir in the remaining sugar and set aside for the topping.
2. Press remaining crumb mixture onto the bottom and up the sides of a greased 8 inch baking dish. Bake at 375 degrees for 10-12 minutes or until edges are lightly browned.
3. Meanwhile, for filling, combine the sugar, 2 TBLS cornstarch, salt and cinnamon in a small saucepan, slowly stir in water and lemon juice until smooth. Bring to a boil over medium heat, cook, and stir for 1 minute or until thickened. Remove from heat; stir in butter and vanilla.
4.Toss pears with remaining cornstarch; spoon over crust. Top with filling. Sprinkle with reserved topping. Bake for 35-40 minutes or until filling is bubbly and topping is lightly browned. Cool on a wire rack.