01 - Preheat oven to 425°F (220°C). Lightly oil a 9x13-inch baking dish.
02 - Combine potato cubes with 2 tablespoons olive oil, salt, black pepper, and smoked paprika in a large mixing bowl. Coat evenly and distribute potatoes in the prepared baking dish.
03 - Roast potatoes for 20 minutes, stirring once halfway through for even browning.
04 - While potatoes roast, toss chicken cubes in 1 tablespoon olive oil with Cajun seasoning until thoroughly coated.
05 - After 20 minutes, remove the baking dish from the oven. Scatter seasoned chicken evenly over the hot potatoes.
06 - Return dish to oven and bake for 20 minutes, until chicken is cooked through and potatoes are golden and tender.
07 - Remove dish from oven. Sprinkle shredded cheddar cheese and crumbled bacon evenly over the top. Bake for 3 to 5 minutes, until cheese is melted.
08 - Remove from oven. Garnish with chopped green onions and dollops of sour cream. Serve immediately while hot.