Roasted Sweet Potatoes
["1 1/2 lb. sweet potatoes, scrubbed and cut into 1-inch cubes", "1 to 2 Tbsp. butter", "salt and freshly ground black pepper"]
["Place potatoes in one layer in a lightly buttered baking dish. Dot with butter and roast in preheated 375\u00b0 oven for 25 to 30 minutes or until tender, tossing every 10 minutes and adding more butter, if necessary.", "Serve hot with salt and pepper to taste."]
["sweet potatoes", "butter", "salt"]