Thinly slice potatoes and place, over lapping, on a greased baking sheet. Sprinkle with salt, pepper, garlic powder, parsley, dried red chilies and paprika. Bake for 20-30 minutes at 350°F.
Spread a very thin layer of tomato sauce on crust and sprinkle with mozzarella (not as much sauce or cheese as on a regular pizza or it will overpower the potatoes) Carefully spread sour cream on top of sauce/cheese.
Place baked potato slices on top and sprinkle with broken up bacon and then onions.
Bake at 425°F for 15-20 minutes. Take pizza out and sprinkle cheddar cheese and chopped green onions.
Turn oven off and put pizza back in for about 5 minutes to melt the cheddar.