Wash the potatoes, in a large pot add the potatoes with water to cover. Add salt and cook the potatoes for 15 to 20 minutes (until tender)
While the potatoes are cooking on the stove cook up the pork cracklings or bacon until crispy and reserve the grease, set the pork cracklings or bacon aside.
After cooking, remove the potatoes from the stove and pour the water out of the pot. When the potatoes are cool, peel them and cut it into pieces.
While waiting for the potatoes to cool, you can also peel onions and cut them into thin slices. Add reserved grease from the pork cracklings or bacon to the pan about a tablespoon, and add the onions (add some salt to release the water from the onions).
When the onions are browning, add chopped potatoes and cook, initially at low temperatures Increase the temperature turning and stirring the potatoes roasting them.
When potatoes are well-roasted, add the cracklings and keep on roasting until they are a bit brownish with a crust. Add salt and pepper to taste.