Put your potatoes in a pot with a pinch of salt and cover them with water. Bring the water to a boil and then lower the heat and simmer until the potatoes are tender (about 20-25 minutes).
Preheat your broiler
Drain the potatoes and pat them dry with a paper towel (careful, they’re hot!!). Place the dried potatoes in a bowl along with the olive oil, salt, and pepper. Toss the potatoes to coat them evenly and transfer them to the baking sheet.
Lightly smash each potato with a potato masher or the back of a fork. Then sprinkle them with parmesan cheese and broil until the cheese is melted and the potatoes are getting crispy (about 10 – 15 minutes). Top with a sprinkle of fresh chives and serve warm.