Cook noodles and drain. Meanwhile cook ground beef with one packet taco seasoning as directed. In large bowl combine tomato sauce and 2nd package of taco seasoning. Stir in cooked noodles and taco meat.
Grease a 2 qt sauce pan. Pour noodle mixture into casserole dish. Slice Velveeta thinly and lay on top. Sprinkle cheddar over top of Velveeta.