Julia Child Supremes De Volaille Aux Champignons Chicken Breast

Name: Julia Child Supremes De Volaille Aux Champignons (Chicken Breast
Ingredients: 4 boneless skinless chicken breasts (supremes); 1⁄2 teaspoon lemon juice; 1⁄4 teaspoon salt; 1 pinch white pepper; 5 tablespoons butter; 1 tablespoon minced shallots or 1 tablespoon green onion; 1⁄4 lb sliced fresh mushrooms; 1⁄8 teaspoon salt; For the sauce; 1⁄4 cup white stock or 1⁄4 cup brown stock; 1⁄4 cup port wine or 1⁄4 cup madeira wine or 1⁄4 cup dry white vermouth; 1 cup whipping cream; salt and pepper; 2 tablespoons freshly minced parsley