Grate the duck outside and inside with salt and spices, create cross-shaped cuts and add chopped garlic. Just make a mesh with cuts throughout the duck. Put mandarin and bay leaf in the duck. Put in the oven for 1 hour 20 minutes at 180 degrees.
Dice the carrots and onions. Remove the duck, put vegetables under it and send it back to the oven for 40 minutes. After getting vegetables, make mashed potatoes with them.
Add flour, wine to vegetables and cook over medium heat for about 3 minutes. Then add the broth and cook for 15 minutes. Strain through full and serve with meat.