To prevent fried polenta from sticking, be sure to use an excellent non-stick cooking surface or plenty of oil.  Before frying, make sure your polenta is cold and cut it into small cubes or triangles. Heat the pan on medium-high heat with enough oil to coat the bottom.  Add the pieces of polenta in one layer and fry on all sides until golden brown. Once they are ready, remove them from the pan and drain them on paper towels before serving.  Additionally, you can sprinkle a bit of cornstarch over the polenta pieces before frying in order to create an extra barrier against sticking. This will help keep your polenta crisp and delicious!