When the oatmeal has plumped up and most of the liquid is gone, stir in the diced apple, dried cranberries, pecans, pumpkin seeds, sunflower seeds, 1 tsp of the cinnamon, the cloves, allspice and brown sugar.
Switch the oven to broil. the broiler. Watch, until the sugar has melted and caramelized. See Note.
For broiling, you can move the rack up to the upper third, but keep an eye on the apple slices so that they don't scorch. If you omit the apple slices, you can even move the rack higher for optimum sugar crust!