Place the cubed potatoes in a large pot and cover them with cold water. Bring them to a boil over medium-high heat and cook for 10-15 minutes or until fork tender.
Drain potatoes in a colander and let them cool a bit.
In a large bowl, whisk together the mayonnaise, yellow mustard, and apple cider vinegar.
Add the hard-boiled eggs, celery, green onions, and drained potatoes. Gently fold the veggies and eggs into the dressing.
Season with salt and fresh ground black pepper to taste. Garnish with a sprinkle of paprika.
Refrigerate for at least 2 hours so the flavors can meld. Serve and enjoy!