Cook the squash by placing in boiling water for about 20-30 minutes - let cool.
Pre-heat oven to 350.
After squash has cooled cut open and take out the insides using a fork.
Mix the squash with the next 8 ingredients, and place in a 9X12 pan sprayed with the butter spray.
In a small bowl spray some butter sray on the cereal, crunch it a bit with your fingers and sprinkle over the pudding.
Bake for about 1 hour 20 minutes, you may have to place foil over the top towards the end so the cereal doesn't get too crispy. Check for doneness by inserting a sharp knife in the center, it should come out clean. Remove from oven and let get to room temp or refrigerate and serve cold, either way it is yummy and an interesting way to use spaghetti squash.