Put the diced potatoes in a saucepan and cover with water; add 1 teaspoon of kosher salt. Bring the potatoes to a boil, cover, and continue boiling slowly for about 10 to 15 minutes, or just until tender. Drain and leave the cover ajar to allow excess moisture evaporate.

In a skillet, sauté the bacon until almost crisp; remove to paper towels to drain. In the drippings, cook the diced sausage with red onion until the sausage is lightly browned and onion is softened.

Add the Cajun seasoning and pepper.

Put the drained warm potatoes in a serving bowl. Add the drained bacon and the sausage mixture and gently toss.

Heat the vinegar, sugar, and water in a saucepan over medium-low heat until sugar is dissolved. Drizzle over the potato mixture and gently toss to blend ingredients.

Serve warm.