Unwrap each stick of string-cheese, place on a baking or sheet pan and store in the fridge until you're ready to use
Season the bread-crumbs in a shallow bowl with salt, pepper, onion powder, garlic powder and chopped parsley. Set aside.
In another shallow bowl, combine flour with a few pinches of salt and pepper.
In a deeper bowl, whisk the eggs and milk.
Dip each stick of string cheese into the egg/milk mixture, then into the flour.
Dip the floured string-cheese back into the egg/milk mixture and then roll in the bread-crumbs. Repeat this step so that each mozzarella stick has 2 coats of bread-crumbs.
As you're breading each of the mozzarella sticks, place them on a parchment-lined baking sheet or pan. Freeze for at least 1 hour.
Heat ¼ of an inch of oil in a frying pan or skillet and once the oil is hot, fry each of the mozzarella sticks for 1-2 minutes. They will be golden-brown in color and should be soft enough to bend.
Drain mozzarella sticks on paper towels or on a metal cooling rack and serve immediately with a side of marinara sauce. Let them cool longer if serving to small children.