Melt-In-Your-Mouth Chuck Roast

Ingredients

• 1 can (14-1/2 ounces) Italian stewed tomatoes, undrained
• 1/2 cup beef broth
• 1/2 cup ketchup
• 3 tablespoons brown sugar
• 2 tablespoons Worcestershire sauce
• 4 teaspoons prepared mustard
• 3 garlic cloves, minced
• 1 tablespoon soy sauce
• 2 teaspoons pepper
• 1/4 teaspoon crushed red pepper flakes
• 1 large onion, halved and sliced
• 1 medium green pepper, halved and sliced
• 1 celery rib, chopped
• 1 boneless beef chuck roast (2 to 3 pounds)
• 3 tablespoons cornstarch
• 1/4 cup cold water