2 large sweet potatoes (1 1/2 pounds), cut into 1/2-inch-thick rounds
1 1/2 tablespoons unsalted butter, melted
Kosher salt and freshly ground pepper
Preheat the oven to 425°. In a large bowl, toss the sweet potatoes with the melted butter and season with salt and pepper. Arrange the rounds on a baking sheet in a single layer. Roast for about 15 minutes, until golden on the bottoms. Turn the sweet potatoes and roast for about 15 minutes, until tender. Transfer to plates and serve.