Campbell's Original Beef Stroganoff

Ingredients

• 1 pound round steak, cut into thin strips
• 1/2 cup chopped onion
• 2 T. butter or margarine
• 1 can Campbell's condensed cream of mushroom soup
• 1/4 cup water
• 1/2 cup sour cram
• 1/2 t. paprika
• 2 cups cooked noodles