Peel potatoes and grate into a cheesecloth-lined bowl with a box grater.
Generously salt potatoes and let sit for 10-15 minutes.
Squeeze out excess liquid and discard. Transfer potatoes to mixing bowl.
To the potatoes, add egg, panko, spices, and cheese and stir to combine.
Heat oil in a cast iron skillet over medium-high heat.
Scoop several balls of potatoes with a melon baller and flatten in the pan with a spatula.
Cook for 4-6 minutes on each side until golden brown.
Once cooked, transfer to a paper towel-lined plate and sprinkle with salt.
Top with sour cream and chives or applesauce.