Red Potato Salad

Ingredients: 2 pounds red potatoes, scrubbed and cut into bite-sized pieces 1/2 cup mayonnaise 1/4 cup sour cream 2 tablespoons Dijon mustard 2 tablespoons apple cider vinegar 1/4 cup finely chopped red onion 1/4 cup chopped celery 2 tablespoons chopped fresh dill (or 1 teaspoon dried dill) Salt and pepper, to taste Optional: 2 hard-boiled eggs, chopped