In a large bowl combine; apples, pears, brown sugar, flour, cinnamon, ginger, nutmeg, lemon and orange zest and juice. Toss to combine and spread out evenly into the prepared pan.
In a small bowl combine the crumble ingredients. Pinch pieces between your fingers and scatter over top of the apple and pear mixture.
Place on the middle rack of your preheated oven and bake for 30-35 minutes or until the crumble is golden and the apples and pears are bubbling.