Preheat your oven to 350. In a 13x9 baking dish spray your dish with some non-stick spray, then pour in evenly all 3 cans pie filling. Set aside.
For Your Topping- Combine your grapenuts and warm water and let stand until all the water is absorbed.
Combine beaten eggs with all other ingredients. Then fold in your grapenuts. Then slowly pour grapenuts mixture over your pie filling. Bake for 50 to 60 minutes or until the cobbler is set and only jiggles slightly. Remove and let cobbler cool and it will set completely. This dessert can be served warm or cold with whipped cream or ice cream or by itself. 8)