Make mashed potato: Peel potato, cut into 2.5cm / 1" chunks. Boil until fully tender (around 10 - 15 mins; check centre with skewer). Drain and mash very well with a potato ricer or masher until smooth and lump-free. Set aside to cool, and measure out required quantity.
Mix Dry: Place flour, salt, sugar and yeast in a large bowl and mix well with a firm rubber spatula.
Add Wet: Make a well in the centre, then add olive oil and warm water. Mix with spatula until you can no longer see flour. Dough should be sticky – too sticky to knead by hand.