I have only fried sliced potatoes as were done in rural Louisiana . Learned from my dad in the 1950's. Slice the potatoes to about 1/4 inch thick, fry till soft inside (or your preference), put onto your plate and enjoy.
Those potatoes in the picture are sliced differently, but look like they were fried in a pan. I was asking how they are cooked in order to find out if they are cooked the same or differently.
My Thai wife, a professional Thai cook, boils sliced potatoes, stops boiling them while they are still firm, then fries them. Those are OK, but they don't have the same taste as those cooked the way I learned from my dad.