Chicken Mushroom Fettuccine

Name: Chicken Mushroom Fettuccine
Ingredients: 6 chicken breast cutlets, about 2 1/2 pounds total; Salt and freshly ground pepper to taste; 2 Tablespoons olive oil, divided; 1 Tablespoon unsalted butter; 8 ounces fresh mushrooms, cleaned and sliced; 1/3 cup minced shallots; 2 cloves garlic, minced; 1/2 cup white wine; 2 Tablespoons minced fresh flat-leaf parsley; 2 Tablespoons all-purpose flour; 1 3/4 cups half and half; 1/2 cup freshly grated Parmesan cheese, divided; 12 ounces fettuccine, cooked according to package directions; Additional sprigs flat-leaf parsley for optional garnish