1 Preheat oven to 350°F. For the Crust, mix flour, confectioners' sugar, thyme and salt in large bowl. Cut in butter with pastry blender or 2 knives until mixture resemble coarse crumbs. Reserve 1/3 of crumb mixture (about 1 cup). Pat remaining crumb mixture into greased foil-lined 13x9-inch baking pan. Bake 15 to 18 minutes or until crust is lightly browned. Remove from oven.
2 For the Filling, mix granulated sugar, flour, ginger and baking powder in large bowl. Add lemon juice, eggs and lemon peel; whisk until blended. Pour lemon filling over warm baked crust. Sprinkle reserved crumb mixture over top.
3 Bake 20 to 25 minutes longer or until filling is set and golden. Cool in pan on wire rack.
4 Sprinkle with confectioners' sugar or drizzle with Lemon Glaze, if desired. Cut into bars to serve.