Preheat your oven to 400°F (200°C).
Wash the russet potatoes thoroughly and pierce them several times with a fork.
Rub the potatoes with olive oil and season with salt and pepper before placing them directly on the oven rack.
Bake the potatoes for 45-60 minutes, or until they are tender.
Once baked, remove the potatoes from the oven and allow them to cool slightly.
Cut the potatoes in half lengthwise and scoop out some of the flesh into a bowl.
Mash the scooped potato flesh with sour cream, half of the cheddar cheese, and season with salt and pepper.
Fold in the cooked steak and green onions, mixing well.
Spoon the mixture back into the potato skins and top with remaining cheddar cheese.
Return the stuffed potatoes to the oven and bake for an additional 15-20 minutes until the cheese is bubbly and golden.