1) In boiling water dip cabbage leaves for about 3 minutes or until limp.
2) Drain and keep aside.
3) In a bowl, mix egg, milk, onions, salt, pepper, beef, and rice.
4) Spoon about 1/4 cup meat mixture at the center of each leaf.
5) Fold in the sides and roll ends over the meat.
6) Arrange it in slow cooker.
7) In a bowl mix tomato sauce, brown sugar, lemon juice, and Worcestershire sauce.
8) Pour the mixture over cabbage rolls.
9) Cook covered on low for 7-9 hours.