In a small bowl combined extra virgin olive oil, garlic, onion powder, rosemary, parsley, salt, and black pepper. Stir to combine and set aside.
Throughly scrub potatoes, and slice partially through (about ⅛th of an inch from the bottom). You can use chopsticks as your guide by placing a chopstick on either side of the potato. This will stop the knife from cutting through. Make ⅛ inch slices all the way down the potato.
Rub each potato throughly with olive oil mixture and including in between the slits.
Place in a 9x13 baking dish that has been coated with olive oil. Sprinkle on a little extra salt.
Bake in a 425° F oven uncovered for about 45 mins or until fork tender.
After baking, top with addition herb oil mixture, and if desired - bacon and grated parmesan. Serve immediately.