Brown bacon in a skillet, saving 2 tbsp drippings to saute onion. Crumble bacon. Combine soup, water, vinegar, sugar and pepper. Add onion and bacon, stirring well. Next, add potatoes and parsley, again combining well.
Pour into the slow cooker, cover and cook on low for 4 hours.
Notes
This scrumptious German Style Potato Salad can be served hot, straight from the slow cooker, or allowed to cool to room temperature, depending on your preference and the occasion.