1. Prepare and microwave sweet potatoes—except cool about 30 minutes or until cool enough to handle. Pare and cut into fourths.
2. Place sweet potatoes in 1-quart casserole; sprinkle with salt. Spoon marmalade onto sweet potatoes.
3. Cover loosely and microwave on high 3 to 6 minutes, stirring and spooning marmalade over sweet potatoes after 4 minutes, until sweet potatoes are hot.