1 cup ketchup
1 teaspoon prepared mustard
½ teaspoon Worcestershire sauce
1 tablespoon vinegar
2/3 cup red or white wine
2 eggs, beaten
½ cup milk
1 cup soft bread crumbs
1 pound/ 450 g lean ground beef or veal
1 teaspoon salt
¼ teaspoon seasoned pepper
3 tablespoons minced parsley
1 grated onion
½ teaspoon extra Worcestershire sauce
2 tablespoons butter or margarine

Put ketchup, mustard, ½ teaspoon Worcestershire sauce, vinegar, and wine into an electric cooker and mix.
Cover and cook on Low while preparing meatballs.
Mix eggs, milk, and bread crumbs in a bowl.
Add meat, salt, seasoned pepper, parsley, onion, and remaining Worcestershire sauce, mix lightly.
Shape into small balls.
Heat butter in a skillet, add meatballs and brown on all sides.
Add browned meatballs to sauce in cooker, mix.
Cover and cook on Low 4 hours.