1 Roll Out Pie Dough And Place In A 9 1/2-Inch Deep-Dish Pie Dish And Place In The Freezer To Set. 2 Preheat The Oven To 400 F. Place The Chopped Pears In A Large Bowl With The Cornstarch, Candied Ginger, Brown Sugar, Maple Syrup, Lemon Juice, And Lemon Zest. Toss Well. 3 Place The Pear Mixture Into The Chilled, Crust Lined Pie Dish And Smooth The Top Of The Fruit. Place The Pie Into The Center Oven Rack And Bake For 45 Minutes. (Put A Baking Sheet On The Rack Under The Pie To Catch Any Drippings.) After 30 Minutes, Line The Edges Of The Pie With Foil Or A Pie Protector To Prevent Them From Burning. 4 While Baking Take All The Oatmeal Crumb Topping Ingredients And Place Them In A Bowl. Use Your Hands And Mix The Ingredients Until Large Crumbs Form. Refrigerate Until Use. 5 After 45 Minutes Reduce Heat To 375F. Remove The Pie And Carefully Place The Crumb Topping Over The Pie, Covering All The Fruit. Bake For Another 15 Minutes. Cool On A Wire Rack For At Least One Hour. Serve.