1Place the potatoes between two chopsticks and slice them thinly without cutting all the way through.
2Parboil potatoes in salted water for 5–7 minutes, then drain and set aside.
3In a small pan, cook 3–4 finely chopped garlic cloves, a handful of parsley, 2 tablespoons of butter, and 2 tablespoons of vegetable oil over low heat for 5 minutes.
4In a mixing bowl, combine 3 tablespoons vegetable oil, 1 teaspoon garlic powder, 1 teaspoon paprika, 1 teaspoon gochugaru, 1 teaspoon oregano, and salt to taste.
5Toss the par-boiled potatoes in the seasoning mixture until well coated.
6Arrange the potatoes on a baking tray and bake in a preheated 400°F (200°C) oven for 20–25 minutes.
7Remove from the oven, brush generously with the garlic butter, and bake for an additional 20–25 minutes until crispy and golden.