In a large bowl, combine the first six ingredients. Set aside 1/2 cup of crumb mixture for topping. Press remaining crumb mixture onto the bottom of a greased 13x9-in. baking dish. (Crust will be crumbly.), Bake at 350degrees for 10 minutes or until lightly browned., In a large bowl, combine the remaining ingredients. Pour over crust. Sprinkle with reserved crumb mixture., Bake at 350degrees for 25-30 minutes or until a knife inserted in the center comes out clean. Let stand for 10 minutes before cutting.