2 large red potatoes, scrubbed, cut into large cubes 1 large sweet potato, peeled, cut into large cubes 1 carrot, peeled, cut into 2-inch pieces 2 parsnips, peeled, cut into 2-inch pieces 1 large red onion, peeled and cut into 1/8ths 1/4 cup olive oil Kosher salt and freshly ground black pepper 3 tablespoons melted…