Make the Pecan Brown Sugar Crust.
Preheat oven to 375° F. Position a rack in lower third of oven.
Slice each pear quarter into bite-size pieces and place them in a large mixing bowl. Add the zest, sugar, flour, and ginger; toss gently. Spoon the fruit into the prepared crust.
To make the crumble topping, combine the extra crust mixture, all-purpose flour, brown sugar, and cinnamon in a small bowl.
Sprinkle over the pear filling and bake until the topping is golden brown and the fruit is tender, 50 to 55 minutes. Let cool before slicing.