Heat oil in Dutch Oven or skillet until thermometer reads 350. Stack mozzarella slices on slice of Pane Turano. Season with salt and pepper. Top with another slice. Half and crumble hardest parts of crust from Pane Turano. Put flour, eggs, and breadcrumbs into 3 separate bowls. Cover sandwiches in each ingredient in the order of flour, eggs, then and breadcrumbs. Fry for 2 minutes until golden brown.