“Potato perfection” isn’t exactly a common saying, but this recipe will bring it into your vernacular. Think of this dish like a giant potato pancake. It’s crispy and golden brown on the outside and tender and creamy on the inside. Slice it into wedges like a pie and serve it with your favorite salad. A quick homemade harissa aioli adds a ton of flavor and bright color. Harissa is sold in jars or tubes in most grocery stores in the international aisle but make sure to use one that’s appropriate to your heat preference: some of them can be very spicy.