Wash potatoes then set on paper towels and pat dry.
Place potatoes in a 12 inch cast iron skillet, add avacado oil, half stick of butter and half of the salt.
Cook the potatoes over medium heat for about 6-8 minutes turning occasionally until the skin of the potatoes begin to bister. Pace skillet in the oven set to 450 degrees F. Roast for 20-25 minutes until potatoes are fully cooked. Poke with a paring knife to check for doneness.
Remove potatoes from the oven and add remaining butter and seasoning. Garnish with fresh scallions