For the sauce, peel the onions and garlic and cut into thin slices. Heat the butter in a saucepan and sauté the onions and garlic in it. Deglaze with white wine, pour in the broth and cream and slowly reduce. Mix in the blue cheese with the hand blender and season the sauce with salt, pepper and caraway seeds.
In the meantime, chop the turkey breast into small pieces, season with salt and pepper. Heat olive oil in a pan and sear the meat in it. Take out, add to the sauce and let it steep briefly.
Arrange on plates and sprinkle with chopped parsley. Homemade spaetzle and vegetables go well with it.