Chicken Tetrazzini

Chicken Tetrazzini 1 pkg mini bow tie pasta 2 cups cubed cooked chicken 1 cup (4 ounces) shredded cheddar cheese 1 can (10 3/4 ounces) cream of mushroom soup, undiluted 1 med. onion, chopped 2 cans (4 ounces each)sliced mushrooms, drained 1/3 cup 2% milk 1/4 cup chopped green pepper 1 jar (2 ounces) chopped pimientos, drained 1/4 tsp salt 1/8 tsp pepper Additional shredded cheddar cheese- optional Cook pasta according to package, drain. Transfer to a large bowl and then add next 10 ingredients, mix it.. Spoon into a greased 2 1/2 qt casserole dish, sprinkle with cheese if desired. Bake at 375 degree, uncovered for 40-45 minutes or until heated through.