Add the potatoes and a huge pinch of salt into a large pot. Fill with enough water to cover the potatoes completely.
Bring to the boil, then boil for an additional 30-40 minutes depending on the size of your potatoes, or until they are soft when poked through with a fork.
Drain the potatoes.
Preheat the oven to 425ºF, and line a large baking sheet with parchment paper.
Cut the potatoes in half lengthwise, then lay out with the cut side open (skin side up) on the baking sheet.
Use a glass or a heavy flat circle to smash the potatoes, squishing them down.
Mince the garlic.
Drizzle the potatoes with the olive oil generously, then sprinkle with the salt, pepper, and minced garlic.
Rub the seasoning in with your fingers.
Bake the potatoes in the oven for about 25 minutes until crispy and golden brown. Enjoy!