Preheat oven to 450 degrees. In a food processor, combine bread and cheese. Season with salt and pepper, and pulse until large crumbs form.
Season sugar-pumpkin puree with salt and pepper; spoon into a 1-quart baking dish. Sprinkle with crumb mixture, and dot with butter. Bake until crumbs are browned, 15 to 20 minutes.
I put a few whole cloves in the water while steaming and used extra sharp cheddar cheese. Delicious!