This cheesy appetizer relies on just a few ingredients and can be put together in a snap.
Preheat oven to 425 degrees. Toss potatoes with olive oil and salt on a rimmed baking sheet. Bake, tossing halfway through, until golden, about 17 minutes. Transfer potatoes to an ovenproof 6-inch skillet. Top with raclette. Bake until bubbly, about 5 minutes. Top with cornichons, and serve with toothpicks.