Clean or peel, wash and chop the vegetables. Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Melt 2 tablespoons of butter in a pot. Sauté the flour in it. Add 200 ml water and milk, stir in broth.
Bring to the boil, add vegetables and simmer for about 5 minutes. Melt the gorgonzola in the sauce. Season to taste with salt and nutmeg.
Mix uncooked noodles with the sauce. Pour into a greased casserole dish. Sprinkle with Gouda and bake in a hot oven for about 10 minutes.