Duck Breast in Red Wine Sauce An Eat'n Man herbs, duck breast, lemon juice, tomato paste, herbs, lemon juice and 10 more Duck Breast in Red Wine Sauce with Two Mushrooms Cooking In Sens. Put the duck breast in the oven for 6-8 minutes for medium rare; 10 minutes for medium well. Rest for 6 minutes before serving. For the mashed potato, chuck all the ingredients in the boiled potato, mix well. For the Red Wine Jus, use the pan you fried the duck breasts in. Take out the rosemary stalks, crush the garlic with a fork.