For the Galette: 3 Granny Smith apples, peeled and cored (flesh cut into 1 - inch squares) 1 lemon, juiced 1 tablespoon brown
sugar 1 tablespoon granulated
sugar 1 teaspoon ground cinnamon 2 dashes salt 1 tablespoon cold butter, cut into small cubes 1 pie crust dough round 1 egg,
beaten (for the egg wash) 3 teaspoons cold water (for the egg wash) 1 tablespoon
sanding sugar (or other type of
sugar with large crystals) Streusel