Gorgeously gourmet, but also casually comforting, this out-of-the-world chicken and thin spaghetti recipe may just be your new favorite. It’s creamy, a bit spicy, and then can be casserole baked into perfection. Pasta, shredded chicken, creamy sauce, and sautéed mushrooms with Parmesan cheese = YUM! Thank you, Karen – for EVERYTHING – your friendship, your…