Position a rack in the upper third of the oven and preheat to 425 degrees F. Generously brush a large skillet with butter, then rub with the garlic. Combine the mozzarella, asiago and raclette in a bowl. Heat the skillet over medium-high heat. Add half of the potatoes, spreading them out. Sprinkle with 3/4 teaspoon salt, half of the cut-up butter, half of the shredded cheese blend, and pepper to taste. Arrange the remaining potatoes on top. Sprinkle with 3/4 teaspoon salt, and pepper to taste. Pour the cream over the potatoes, then add the nutmeg and bay leaves; simmer 3 minutes. Dot the potatoes with the remaining cut-up butter. Sprinkle the potatoes with the parmesan and the remaining shredded cheese blend. Bake until golden, about 25 minutes. Let rest 5 minutes before serving. Discard the bay leaves.