Cook macaroni pasta, according to package directions. Meanwhile, in a large saucepan, melt butter over medium heat. Stir in flour, salt and pepper until smooth; gradually whisk in warm milk. Bring to a boil, stirring constantly.
Cook and stir 1-2 minutes longer or until thickened and add pumpkin purée. Stir in cheese until melted. Drain macaroni; add to cheese sauce and stir to coat. If desired, sprinkle with paprika. Preheat oven to 375 F/ 180 C. Carve the little pumpkins, remove seeds.
Place the pumpkins in the oven and bake for 30 minutes, or until it softens. Once the pumpkins are baked, portion the mac and cheese inside the cavity of the pumpkins and sprinkle with seasoned breadcrumbs. Place it back to the oven and bake for 10 minute.
Always make sure, that you are using edible pumpkins for this recipe. Keep in mind, that not all pumpkins are edible, and they could be used only for decorative purposes.