Wash the duck legs and boil them in 2-3 l salted water. Simmer at medium heat for about 30 minutes, skimming the resulting foam from time to time. Lift out legs and let them drip off. Pour stock through a fine sieve, measure 1⁄2 l (let the rest of the stock cool down, degrease and use for soups and sauces).
Clean or peel the soup greens, wash and cut into thin slices or strips. Cover lentils and vegetables and simmer in 1⁄2 l duck stock for about 30 minutes.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3). Season legs all around with salt and pepper. Place them on the grill above the fat pan. Bake in the hot oven for about 30 minutes until crispy.
Wash the rosemary, dab dry and chop. Mix with honey and wine. Spread the legs 2-3 times 15 minutes before the end of the roasting time.
Season lentil vegetables with salt, pepper and a little honey. Arrange everything. Serve with boiled potatoes or gnocchi.