Place a potato between the handles of 2 chopsticks or 2 spoon handles. Slice the potato into thin slices, stopping the knife about 1/4 of an inch from the bottom; the chopsticks will prevent you from slicing the potato all the way through. Repeat with the remaining 6 potatoes. Place the potatoes in an oven-proof skillet or on a baking pan.
In a small bowl, stir together the melted butter, olive oil, parsley, thyme and pepper. Brush the butter mixture over each potato, working the brush in between all the slices, using your fingers to separate the slices.
Sprinkle each potato with sea salt. Bake on the center rack of oven until tender and crisp, about 50 - 55 minutes.
Serve hot with green onion and sour cream on the side
Note - salted butter may be used instead of unsalted. To keep from being too salty, you may reduce or omit sprinkling salt on potatoes prior to baking.