Prepare one pound of noodles or macaroni, cook partly. In a 13"x9" casserole, place noodles, one can tuna, one can creamed celery, and one can of milk. Add one package frozen peas and carrots and one tablespoon butter. Mix together, bake at 325 degrees for 30 minutes. The last five minutes, male a half stick butter and mix with 1/4 cup cracker crumbs, fry and sprinkle over casserole and finish baking.