Clean and wash the leek and cut into fine rings. Melt the fat in a large pot. Steam the leek in it. Deglaze with broth. Season with salt and pepper. Simmer covered for about 10 minutes. In the meantime dice ham finely.
Fry in hot oil until golden brown. Wash the chives, dab dry and cut into fine rolls. Grate Gouda finely. Stir cream, soft cheese and Gouda into the soup. Bring to the boil briefly and season to taste with salt, pepper and nutmeg. Sprinkle with ham and chives. Serve with baguette