In a medium bowl, mash mozzarella, then stir in chives, cranberries and garlic powder. Season to taste with salt and pepper. Form mixture into small balls and set aside.
In a small bowl, combine cornstarch and water. Spread bread crumbs on a plate. Dip a mozzarella ball in cornstarch mixture, then roll in bread crumbs. Repeat to create a very thick coating. Set aside. Coat all balls in the same way.
In a small saucepan, heat oil over medium heat. Add 2 croquettes, ensuring that they are completely covered in oil, and cook until browned. Using a slotted spoon, transfer croquettes to a plate lined with paper towel to absorb excess oil. Repeat with the remaining croquettes. Serve hot.