Heat 1 tablespoon olive oil in a large ovenproof skillet over medium heat until hot; add mushrooms and saute until they begin to brown, 3 to 5 minutes. Remove and set aside. In same skillet, heat 1 tablespoon olive oil over medium heat, add Italian sausage and onion, and cook about 3 minutes, breaking up sausage into bite-sized pieces. Add butternut squash and cook, stirring occasionally, until sausage is browned and squash begins to soften and deepen in color, about 10 minutes. Add garlic, sage, salt, pepper, cinnamon and crushed red pepper, and cook, stirring, 1-2 minutes. Add tomatoes, 2-1/2 cups water and mafalda pasta; bring to boil, cover skillet, reduce heat and simmer until pasta and squash are tender, 15 to 18 minutes.