Something I’ve always had at home, around xmas time, and has traveled to Europe with me. It has warmed the stomachs of friends and strangers in winter, a definite ice breaker.
This soup is really hearty, and oily. Do skim the layer of oil periodically to let the soup reduce better. Oil collected can be refrigerated for future use, and is great for roasting potatoes or frying stuff. Experiment with portions so you find a combination of taste you like. It has to be balanced out with a bit spicy, a bit sour, a bit salty, and very warming, with the duck falling off the bone in tender melting bits.