Slice string cheese pieces in half, for a total of 32 pieces.
Place flour in a small bowl.
In a separate bowl, whisk eggs and milk.
In another separate bowl, combine panko bread crumbs with parsley flakes.
One by one, roll mozzarella sticks in flour, then dunk in egg/milk mixture, then place in panko crumbs. Use your hand to sweep crumbs all over the mozzarella stick. Gently remove and place on a tray or cookie sheet. Repeat until all mozzarella sticks are coated.
***Place tray in freezer for 20 to 30 minutes to flash freeze.***
Heat 1 1/2 inches canola oil in a large skillet over medium heat. When hot, add mozzarella sticks 8 at a time. Watch closely and turn over to evenly brown, cooking less than 2 minutes. Do not allow cheese to bubble and leak.
Remove to a paper towel-lined plate.
Serve immediately with warm marinara sauce or ranch.