Beat horseradish, mayonnaise, Worcestershire sauce, salt, and cream cheese until it reaches spreading consistency. Place 1 ham slice on a sheet of waxed paper. Spread with 1/5 of horseradish mixture. Layer with remaining ham and horseradish mixture, ending with a ham slice. Wrap in waxed paper. Freeze 2 hours, or overnight. Cut into small cubes. Spear each cube with a wooden toothpick. Let stand 1 hour before serving.

Yields 36 servings. Per serving: 28 calories, 2 g fat, 9 mg cholesterol, trace carbohydrates, 0 g fiber, 1 g protein, 103 mg sodium.