Barbecued Sliced Pork Sandwiches

Ingredients

• 1/4 cup sugar
• 4 teaspoons cornstarch
• 1-1/2 teaspoons dried minced onion
• 1 teaspoon salt
• 1/4 teaspoon pepper
• 1-1/2 cups ketchup
• 3/4 cup water
• 1/4 cup cider vinegar
• 1/4 cup butter, cubed
• 3 tablespoons Worcestershire sauce
• 2 tablespoons lemon juice
• 1 tablespoon prepared mustard
• 3 cups sliced cooked pork (about 1-1/2 pounds)
• 8 sandwich buns, split