Boil Potatoes: In a large pot, cover potatoes with cold water by one inch and liberally salt the water. Bring the potatoes to a boil over medium-high heat, then turn down the heat to medium and continue to cook until potatoes are barely tender when pierced with a knife, 15-20 minutes. Drain the potatoes in a colander and set them aside to cool.
Make the dressing: In a small mixing bowl, whisk together the mayonnaise, mustard, lemon juice, garlic, salt and black pepper.
Make the salad: Cut the now-cooled potatoes into small cubes. Place them in a large mixing bowl. Add the pickles, red onion, scallions, capers, eggs, and chopped parsley. Pour the dressing over the mixture and give it a gentle stir. Taste for seasoning and adjust if necessary. Serve warm, room temperature, or cold.
