Fill a large pot with water, add in the potatoes and bring to a boil over medium heat. Cook the potatoes until fork tender, about 10 minutes or longer as needed. Drain and spread out the cooked potatoes on a baking sheet to cool, about 15 to 20 minutes.
As the potatoes cool, prepare the garlic. In a small saucepan over medium low heat, melt the butter. Add in the garlic and cook while stirring until the garlic starts to soften and become fragrant, about 1 minute. Remove cooked garlic from the heat and set aside to cool.
Once the potatoes are fully cooled, transfer it into a mixing bowl and mashed until smooth. Mix in the cooled garlic, parsley, parmesan cheese and seasonings (onion powder, salt and ground white pepper) to combine.
Evenly divide the mashed potatoes into 10 balls. I used a 1.5 ounce (3 tablespoons) cookie scoop which yielded 10 balls. Working with one ball at a time flatten into a flat disk, place a piece of cheese in the center and, and enclose to form a ball. Transfer to a parchment lined baking sheet.
Cover baking sheet with filled potato balls with plastic wrap and place in the freezer to firm up for 1 hour.
Setup breading station. In bowl 1, add the flour. In bowl 2, add the eggs and water and whisk to combine. In bowl 3, mix together the breadcrumbs, parmesan cheese, and seasonings (onion powder, garlic powder, salt and ground white pepper). Retrieve potato balls from the freezer.
Working with one ball at a time, coat in the flour, then the egg mixture and lastly in the breadcrumbs mixture. Do a second coat but time only coat the breaded ball in the egg and back into the breadcrumbs mixture. Transfer breaded potato ball to a parchment lined baking sheet and repeat with the remaining balls.
Heat up oil in a deep bottom pan to 350F. In batches, fry the potato balls, turning occasionally, until golden brown and crispy, about 4-5 minutes or longer as needed. Transfer fried potato balls to a wire cooling rack placed over a paper towel lined baking sheet to catch any excess oil. (Use a fry thermometer, if you have one. You want to maintain the oil temperature between 325 and 350F as you fry each batch of potato balls.)
Top potato balls with finely chopped parsley and freshly grated parmesan cheese. Serve immediately while still warm as is or with your favorite sauce. Enjoy!