Mozzarella In Carrozza (Italian Fried Mozzarella Sandwiches)

Name: Mozzarella In Carrozza (Italian Fried Mozzarella Sandwiches)
Prep time: 10 min
Cook time: 5 min
Total time: 15 min
Yield: 2 servings
Ingredients: Neutral oil such as vegetable or canola, for frying4 teaspoons mayonnaise, optional; 4 slices white sandwich bread; 5 ounces (140g) firm fresh mozzarella cheese or low-moisture mozzarella cut into 1/4-inch-thick slices or pre sliced thin (see notes); 3 large eggs; 3 tablespoons finely grated pecorino cheese; 3/4 cup store-bought plain dried bread crumbs (see notes); 1/2 teaspoon Diamond Crystal kosher salt; if using table salt, use 1/4 teaspoon; 1/2 teaspoon freshly ground black pepper