Preheat the oven to 400 F. Rinse and scrub the potatoes. Pierce them with a fork or make a small cut laterally with a knife, slightly piercing the skin.
Place the potatoes on a baking sheet, then bake them for 45 minutes or more until they are soft to the touch or when you puncture them with a fork.
Remove the potatoes from the oven and allow them to cool for a few minutes until you can handle them without being burned.
Cut the potatoes in half. Carefully scoop the flesh, and add them to a bowl. Leave about ¼ inch of a rim around the skins.
Add the vegan sour cream, salt, and pepper to the bowl and mash the potatoes using a masher or large fork. You want the potatoes creamy, although a few lumps are perfectly fine.
Use a spoon to mix in the olives, chilies, and chives. Then refill the potato skins with the mashed potatoes, placing them back on the baking tray.
Bake the potatoes for 10-15 minutes until the tops are slightly brown.
Remove the potatoes and serve them immediately if you want them hot. Garnish with additional chives or sides of sour cream or salsa if desired.