1. Bake potatoes until done. 2. Cut potatoes in half lengthwise; scoop out insides leaving a thin shell. 3. Mash potatoes with butter and salt. Gradually add soup and beat until light and fluffy. 4. Spoon into shells. 5. Bake in a 2 1/2 qt. shallow baking dish (9 x 13 ) at 450 for 15 minutes or until hot.