
Preheat the oven to 375°F.
Wash potatoes and cut into 1" cubes. Bring a large pot of salted water to a boil. Add potatoes and cook 12-15 minutes or until tender.
Meanwhile, season chicken with salt & pepper. Over medium heat, fry chicken until no pink remains (about 6-8 minutes).
In medium bowl, combine ranch dressing, sour cream, ¾ cup cheese, and seasonings. Mix well.
Place chicken and potatoes into a greased 9x13 pan. Sprinkle with half of the bacon and half of the green onions. Spread sauce over top.
Top with remaining cheese and bake 35 minutes uncovered or until browned and bubbly.
Remove from the oven, sprinkle with remaining bacon and green onions. Serve with sour cream if desired.