Preheat the oven to 350 degrees F. Cut each baked potato in half lengthwise. Scoop out enough of the potato flesh (keep it for another use, such as hash browns) to leave a half-inch thick shell of skin and flesh. Cut each half potato lengthwise in three wedges and place flesh side up, on a parchment paper-lined baking sheet. Sprinkle the potatoes with the Cajun spice; top with the cheese and bacon. Bake for 12 to 15 minutes, or until the cheese is melted and the potatoes are well heated through. Arrange the potato skins on a platter. Top each with a small dollop of sour cream, sprinkle with green onions and serve.