Start by cooking your potatoes. Place them in a large pot with plenty of water and a generous pinch of salt. Bring to a boil over high heat, then reduce to medium and simmer for about 10 minutes, or until fork-tender.
Once cooked, drain the potatoes and arrange them on a baking tray lined with parchment paper. Using a glass gently smash each potato until flattened but still holding together.
Preheat your oven to 200°C (392°F). Lightly spray the smashed potatoes with olive oil and sprinkle with a little more salt. Bake for 20-25 minutes, or until they are beautifully golden and crispy.