Prepare the risotto and let it cool completely.
Take a small portion of risotto and flatten it in your palm.
Place a cube of mozzarella cheese in the center.
Form the risotto around the cheese, rolling it into a ball.
Dredge each ball in flour, dip in egg, then coat with breadcrumbs.
Heat vegetable oil in a deep pan over medium heat.
Fry the arancini in batches until golden brown.
Remove and drain on paper towels.
Serve hot, garnished with fresh basil.