Pre-heat oven to 400°F
Clean potatoes and slice to desired thickness using a mandoline or knife
Soak sliced potatoes in cold water for 15-20 minutes
Lay potatoes out on paper towels and dry for a few minutes
Lay potatoes out on sheet pan lined with parchment paper
Brush potatoes with melted butter and season both sides with salt and pepper
Bake for 30 minutes, turning halfway if desired
Remove from oven and top each slice with cheese, chopped bacon, and green onions
Bake for an additional 5-10 minutes
Serve with sour cream for dipping
