In a large stockpot, fill ¾ full of water and add ¼ teaspoon salt and potatoes; bring to a boil over high heat. Boil 15-20 minutes until potatoes are tender. Drain and set potatoes aside.
In a large skillet, cook bacon over medium-high heat until lightly browned. Add onion and cook 5 more minutes until translucent.
In a small bowl, whisk together Splenda Sweetener, flour, and remaining salt.
Add Splenda Sweetener mixture to skillet and cook for 1 minute. Add water and vinegar; stirring constantly. Add potatoes and stir well.