Brown ground beef and onion in large skillet and drain on paper towels. Season with salt & pepper.

Slice or chop cabbage after removing the core. Place cabbage in a 13x9 greased casserole and spoon ground beef mixture over cabbage. Spread the undiluted soup all over. Sprinkle with Worcestershire sauce all over tomato soup.

Cover and bake at 350 degrees for 1 hour.