1. Place the potatoes, apples and salt in a large saucepan; add enough water to cover. Bring to a boil; cover and cook for 12 minutes or until tender.
2. Meanwhile, in a small skillet, cook bacon over medium heat until crisp. Remove to paper towels; drain, reserving 1 teaspoon drippings. In the drippings, saute onion until tender.
3. Drain the potatoes and apples. Add the butter, vinegar and sugar; mash until smooth. Top with bacon, onion and nutmeg. Yield: 4-6 servings.