Peel and quarter the russet potatoes. Add to a pot of boiling water, cook for 10 minutes. Strain the potatoes to steam for 10-15 minutes, until cool enough to touch.
Using a box grater, grate the potatoes into a large bowl. Add the remaining ingredients, including the two tablespoons of olive oil. Mix just until well combined.
Using 1/4-1/3 cup potato mixture per hashbrown, shape into patties. Place on a parchment paper lined baking pan.
Freeze the shaped patties for 20-30 minutes.
Heat up 1-2" of frying oil in a skillet over medium high heat. Once the oil is hot (but not smoky), temperature should be 350-375F, work in small batches to fry the patties until deeply golden on all sides.
Remove with a fork or slotted spoon to a paper towel lined plate to drain excess oil.
Garnish with extra freshly chopped parsley and grated parmesan.