Cook Potatoes: Boil whole potatoes in salted water until tender (15-20 mins). Drain, cool slightly, peel, and slice.
Cook Bacon: In a skillet, fry bacon until crispy. Remove, crumble, and set aside.
Sauté Aromatics: In bacon fat, cook onions until soft. Add garlic and cook for 30 seconds.
Make Dressing: Whisk in vinegar, broth, mustard, sugar, salt, and pepper. Simmer for 2-3 mins.
Combine: Add potatoes and bacon to the skillet, tossing gently to coat. Heat through.
Garnish & Serve: Sprinkle with parsley and serve warm.