To make them, start by preheating your oven to 450 degrees Fahrenheit. Then, bring a large pot of salted water to a boil and add the potatoes. Let them boil for about 15-20 minutes until they're fork-tender.
Once they're done, drain them and let them dry off a bit—that step is key!
Next, generously spray a baking sheet with oil and place the potatoes on it. Use the bottom of a glass to gently smash each potato. Drizzle them generously with olive oil and sprinkle on some salt and pepper.
Pop them in the oven and bake for 15 minutes, then flip them over and bake for another 10 minutes until they're nice and crispy.
Once they're out of the oven, drizzle them with the malt vinegar, sprinkle on some fresh chives, and dig in right away! Enjoy!