Dice the buns. Heat 200 ml milk with 1 tbsp. butter, add. Finely dice the cheese. Clean, wash and cut spring onions into rings. Wash the chives and cut into small rolls (put something aside for sprinkling). Knead both with half cheese and eggs under the rolls. Season with salt and pepper.
Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer). Cut a lid out of each pumpkin, scrape out the seeds with a spoon. Pour in the dumpling mixture. Put pumpkins with lid into a casserole dish, add 1⁄4 l hot water and broth. Bake in the oven for about 1 hour, cover with foil if necessary.
Heat 2 tablespoons of butter. Sweat flour in it, add 400 ml milk while stirring and simmer for about 5 minutes. Stir in the rest cheese and kirsch. Season with salt, pepper and nutmeg. Arrange pumpkins with sauce.