Step 1

Boil the potatoes until fork tender, and let cool for 20 minutes.

Step 2

In a large bowl, mash the potatoes. (For a creamier texture, use a potato ricer.) Add the Parmigiano cheese, chopped parsley, and season with salt and pepper. Add one egg and mix well, until all the ingredients are evenly distributed.

Step 3

Grab a handful of mashed potatoes and press into logs that are 1 1/2-inches thick by 3 inches long. With your finger, create an indentation in the middle of the log and add a slice of mozzarella. Close up the logs and make sure the mozzarella is fully covered. Reshape if necessary.

Step 4

For the batter, dip potato logs in a beaten egg and cover with breadcrumbs.

Step 5

Heat the extra-virgin olive oil in a large pot to 350 degrees F.

Step 6

Fry in the oil in batches until the potato croquettes are crispy and golden brown.

Step 7

Let drain on a paper towel lined plate, and serve warm.