Preheat oven to 375. Clean and scrub potatoes well. Slice the potatoes into 1/4" thick slices Be sure to error on the thicker side or they'll end up too crispy). Place potatoes on lightly buttered baking sheet and season each side with salt, black pepper, and paprika. Cook for 20 minutes. Flip potatoes over and cook for an additional 10 minutes.

Remove pan from oven and place a pinch of cheese and bacon on top of each potato slab. Return the pan to the oven and cook until cheese is melted and bubbly, about 4-8 minutes. Serve with green onions and sour cream, if desired.