Roll out half the dough (one disk) on a lightly floured sheet of parchment paper to 1/4-inch thickness (about a 12-inch circle). Fit into a 9-inch pie plate, crimping edges as desired. Refrig­erate for 30 minutes to 1 hour. Preheat oven to 425 degrees F. Combine maple syrup and next 3 ingredients in a 3 1/2-quart sauce-pan. Cook over medium heat, stirring often, until sugar dissolves, about 3 minutes. Remove from heat; let cool 5 minutes. Whisk in butter and salt. Whisk in egg yolks. Spread pecans evenly in prepared crust. Carefully pour syrup mixture over pecans. Place in preheated oven and reduce heat to 325 degrees F. Bake for 45 to 50 minutes or just until filling is set and center jiggles slightly when gently shaken. Cool completely on a wire rack.