Wash, clean and chop the vegetables, fry them briefly in butter, add water, season with salt and pepper and simmer for approx. 1 hour.
Strain the broth and let it simmer slightly.
Whisk eggs with milk, salt, pepper and nutmeg. Pour into a buttered, fireproof form and simmer in a water bath until the mixture solidifies. Then turn out and dice.
Place the cubes in soup plates and pour hot broth over them.