Preheat oven to 350º. In a large bowl, toss together the noodles, soup, broth and sherry. Add the chicken, 2 cups cheese, almonds, pimentos, mushrooms, and salt and pepper to taste. Toss gently to combine. Transfer mixture to a greased 13 x 9 baking dish and top with the remaining cheese. Bake for 30 minutes, or until bubbly.