The Best Potato Salad Ever

Name: The Best Potato Salad Ever
Prep time: 4 h 25 min
Cook time: 15 min
Total time: 4 h 40 min
Cuisine: European
Ingredients: 2 pounds baby red potatoes (quartered); 1/3 cup mayonnaise; 1/3 cup sour cream; 1 1/2 tablespoons Dijon mustard; 1 tablespoon freshly squeezed lemon juice; 2 teaspoons lemon zest; Kosher salt and freshly ground black pepper (to taste); 2 celery ribs (diced); 3 tablespoons capers (chopped); 3 tablespoons finely chopped fresh parsley leaves; 3 tablespoons finely chopped fresh dill; 2 green onions (thinly sliced); 4 soft boiled eggs (quartered)