Lightly toss the potatoes with 1 tablespoon oil and the minced garlic
Layer potatoes around the edge of the skillet. You'll want to select pieces that are roughly the same size. Over lap the potatoes by about half, using one hand to add potatoes while the other hand keeps the potatoes in place. You'll want them to be at about a 60 degree angle, slightly angled back, following the contour of the skillet.
Once your first layer is done, add two more, each inside of the other. You might need four total layers depending on the size of your skillet and potatoes.
When you get to the end you'll have a little round 'hole' in the middle. Place a potato end (point-side up) in that spot to complete the arrangement.
Combine the seasonings and sprinkle over the tops of the potatoes. Don't be shy.
Sprinkle the bacon pieces over the top and place in the oven for 45 minutes.
Drizzle with the butter, raise the temperature to 425 F, and cook another 15 minutes.
Sprinkle with the cheese and return to the oven for 5 minutes to melt the cheese.
Serve garnished with sour cream and green onions.
You'll need a cast iron skillet to make these roasted spiral potatoes. The larger the skillet, the more potatoes you will need. I used a 10" Lodge.