This Rustic Potato Salad is a hearty and flavorful side dish that combines tender potatoes with a tangy Dijon mustard dressing, fresh herbs, and crisp red onions. The potatoes are boiled until perfectly cooked, then tossed with the dressing while still warm, allowing them to absorb the delicious flavors. This easy-to-make salad is perfect for picnics, barbecues, or as a comforting everyday side dish.