Creamy Chicken and Noodles

Name: Creamy Chicken and Noodles
Ingredients: 3 tablespoons butter; 2 tablespoons EVOO; 12 ounces white mushrooms, sliced; 2 tablespoons fresh thyme, finely chopped; 2 leeks, thinly sliced; 1 small carrot, finely chopped; 1 small rib celery, finely chopped; Salt and freshly ground black pepper; 3 tablespoons all-purpose flour; 1/2 cup dry white wine; 1 1/2 to 2 cups homemade or store-bought chicken stock; 1/2 cup heavy cream; A few grates nutmeg; 2 to 3 cups cooked poached chicken breast or rotisserie chicken, pulled or chopped, skin and bones removed; 1/2 pound extra-wide egg noodles; 2 tablespoons Dijon mustard; 2 tablespoons chopped fresh dill or tarragon