Heat oven to 350. Spray a lg casserole dish w/ cooking spray. In lg skillet, over medium heat, saute mushrooms, onions and green bell pepper in butter until tender.Add soup, milk and basil, heat through.
Place pasta in bottom of casserole dish. In lg bowl, combine cottage cheese, cheddar cheese and 1/4 cup parmesan cheese. Mix well. Spread cheese mix over pasta.
Top mix w/ chicken. Pour soup/sauce mix over chicken. Sprinkle w/ remaining parmesan cheese. Cover, bake 50 mins, or until bubbly.