Authentic German Potato Salad (Swabian Style)

This authentic German potato salad recipe comes from the Swabia region of southern Germany where it remains one of the most popular and most delicious of all potato salads!

• 3 pounds small firm, yellow-fleshed waxy potatoes (e.g. Yukon Gold) of similar size, skins scrubbed and peels left on
• 1 medium yellow onion , chopped
• 1 1/2 cups water mixed with 4 teaspoons beef bouillon granules (Vegans: use vegetable bouillon)
• 1/2 cup white vinegar
• a few splashes of Essig Ezzenz , (highly recommended for the best, authentic flavor)
• 3/4 tablespoon salt
• 1/2 teaspoon freshly ground white pepper
• 1 teaspoon sugar
• 2 teaspoons mild German mustard (If you can't get it, use regular yellow mustard)
• 1/3 cup neutral-tasting oil
• Fresh chopped chives for garnish