Whisk eggs in a deep dish, season with salt and pepper. Put flour and polenta in a deep plate. Turn the mozzarella balls first in the flour, then in the eggs and finally in the polenta. Place on a plate and chill for about 15 minutes
Heat oil in a high pot, fry balls in it for 1-2 minutes until golden brown. Let it drip off on kitchen paper. Season with salt and pepper