Preheat oven to 350ºF. Pulse crumble topping ingredients in a food processor until a coarse crumb forms. Set aside. Combine filling ingredients in a medium bowl until well blended. Spread filling in a 9” x 13” baking dish.
Top with crumble. Place on middle oven rack and bake 30 to 40 minutes until cooked through and crumble is browned. Serve warm with whipped cream, crème fraîche or ice cream.