SUGAR PIE (TARTE AU SUCRE)

Steps:

• Prepare the crust. Partially prebake. Combine the flour, brown sugar, salt and cinnamon in a large bowl. Add the butter and cut it into the dry mixture with a pastry blender until it is broken into very small pieces. At that point, using your fingertips, continue to rub the mixture until you form crumbs that clump together when firmly pressed. Set aside. In a small saucepan, gently heat the maple syrup until it is slightly warmer than body temperature. Transfer to a large bowl and whisk in the baking soda. Whisk the egg and egg yolk together in a small bowl just until frothy, then whisk into the warmed maple syrup. Stir in the vanilla. Spread about half of the crumbs in the cooled pie shell. Slowly pour the maple filling over the crumbs. Scatter the remaining crumbs evenly over the filling, then set the pie on a large aluminum foil-lined baking sheet. Place on the center oven rack and bake at 350 degrees until the filling has puffed considerably and turned dark golden brown, about 30 minutes. Rotate the pie 180 degrees about halfway through the baking. Transfer the pie to a wire rack and let cool thoroughly. Serve slightly warm or cool.