Brown ground beef in skillet. Drain off any grease. Add mushrooms, salt, pepper, sugar and tomato sauce. Cover and simmer for 15 minutes.
Cook noodles according to package directions; drain.
Combine onions, using some of the green tops, with cream cheese and sour cream; blend well. In a greased 2 qt. casserole, spread 1/4 of the noodles, then 1/4 of the ground beef mixture, then spread with 1/4 sour cream mixture on top. Repeat 3 times. Top with cheddar cheese.
Bake at 350 degrees F until it bubbles in the center, about 50 minutes if chilled and 35 minutes if unchilled. Makes 6-8 servings.
By Robin from Washington, IA
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