Soak rolls in cold water. Wash herbs, dab dry and chop. Peel and finely chop the onion. Cut tomatoes into small pieces. Squeeze the bread roll and knead with minced meat and other prepared ingredients.
Season with salt, pepper and mustard. Shape into an elongated roast. First roast in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40 minutes. Sprinkle with cheese and roast for about 20 minutes.
Cut the pumpkin into slices, remove the seeds and peel. Cut the flesh into cubes. Clean, wash and cut leek into rings. Cook in 1/4 litre boiling salted water for about 12 minutes. Drain, put stock aside.
Melt 1 tablespoon of butter. Sweat flour in it. Add the stock and cream, stirring constantly, and bring to the boil. Season to taste with salt, pepper and nutmeg. Heat 1 tablespoon of butter. Fry the pumpkin for about 5 minutes at medium heat while turning.
Season with salt and pepper, add leek. Serve roast, vegetables and sauce garnished with fresh herbs.