Preheat your oven to 425°F (220°C).
Wash and scrub the russet potatoes, then prick them with a fork.
Rub the potatoes with olive oil and season with salt and pepper.
Place the potatoes directly on the oven rack or on a baking sheet. Bake for 45-60 minutes, until tender.
While the potatoes are baking, prepare your chili if making it from scratch.
Once the potatoes are cooked, remove them from the oven and let them cool slightly before handling.
Slice the potatoes in half lengthwise and gently fluff the insides with a fork.
Spoon the chili over the fluffed potato halves, then sprinkle with shredded cheese.
Return the assembled potatoes to the oven for about 5-10 minutes, or until the cheese is melted and bubbly.
Remove from the oven and top each potato with a dollop of sour cream and a sprinkle of green onions.