Pop your chopped or cubed potatoes in a saucepan with room temperature water and bring to the boil. From there, it should take around 10 minutes for the potatoes to partially cook (aka parboil). You can check the potatoes every few minutes by piercing with a fork. If they're too firm, leave them for a few more minutes. We're aiming for tender potatoes that still hold their shape and don't fall apart when piercing with a fork.