Preheat oven to 350 degrees F.
Peel and cut the sweet potatoes into 1-inch pieces and put in a 9 by 13 baking dish. In a small bowl whisk together olive oil, honey and lemon juice. Pour mixture over potatoes and toss to coat. Sprinkle with the salt, and bake, stirring occasionally, for about 1 hour, until potatoes are tender.