Hanks Franks hot dog potato topping

For years, I've gone to Hanks Franks (Facebook Page) in Lodi to have anywhere between 5 and 9 hot dogs with a variety of toppings. One of the favorites is the potato topping and out of the area, when describing this, many reactions are "potatoes on a hot dog???". 

Ingredients: 
2 Medium Baking or Russet potatoes
2 Tbsp stick butter
Kosher Salt*
Cracked Pepper*


Preparation: 
Dice potatoes into 1/4 - 3/8" cubes and soak in cold water.  In a pot, bring about 1 1/2 quarts of water to a boil, salt with kosher or sea salt in similar fashion to pasta. 


Cooking:
Strain potatoes and add to the boiling water, boil potatoes until they are fork tender (approximately 5 - 10 minutes depending on how large the chunks are). Once they are fork tender, remove from heat, and strain. Season with salt and pepper and return to the pot. 

Refill the pot with water just over the level of the potatoes and add butter. Return the pot to the heat (same high heat as was done to boil the water) and cook down water stirring occasionally until the potatoes start to break down. Remove from heat while there are still solid potato chunks and let sit for a minute. 

Serving:
Spoon over grilled or boiled hot dogs. Goes well with cheese sauce or chili.