Preheat oven 375 degrees. Start by carefully cutting the top off your pumpkin and cleaning the insides out.
Combine all remaining ingredients (except the sugar for sprinkling, nuts and milk for splashing) in a large bowl. Stir well and pour batter into the pumpkin. Sprinkle lightly with brown sugar. Place the pumpkin on a cookie sheet and bake for 20 mins with the top off and than cover with the top and bake another 25-40 mins until pumpkin is soft enough to scoop and oatmeal is done. After it was done, you can top with nuts or seeds and add a splash of milk. Makes 4 servings.