Heat butter in large skillet, over medium-high heat. Add shallots and sauté for 30 seconds.
Add mushrooms and caramelize approximately 4-5 minutes. Add turkey and brown. Add Marsala and reduce by half. Add chicken stock and simmer for 5 minutes.
Meanwhile, cook pasta according to package directions, drain the pasta.
Fold pasta, parsley and turkey mixture together. Season with salt to taste.
Spray casserole dish with nonstick spray.
Place turkey pasta mixture in casserole dish, spreading evenly. Top with cheese and bake for 20 minutes. Let stand 5 minutes before serving.