1. Slice potatoes into a large, heat-resistant, non-metallic bowl. 2. Add crumbled bacon. 3. Place oil or bacon fat in a medium-sized, heat-resistant, non- metallic bowl. 4. Add the 1/2 cup chopped onion and heat, uncovered, in Micro- wave Oven 5 minutes or until lightly browned. 5. Add vinegar and cook an additional 3 minutes. 6. Combine all ingredients with the potatoes; toss lightly. 7. Serve hot.