Preheat the oven to 425F and line a baking sheet with parchment paper.
Bring a large pot of water to a boil, adding the salt and baking soda. Once the water is boiling, add your potatoes, and cook for exactly 10 minutes before draining. Allow the potatoes to sit for 2 minutes.
In the meantime, combine the oil, dried parsley and half of the minced garlic. Pour it over your cooked potatoes and shake the bowl roughly until a layer of mashed potato builds on the potato chunks.
Transfer the potatoes to your baking sheet, and bake for 10 minutes. Shake the pan and turn over the potatoes, then bake for an additional 35 minutes until crispy. Garnish with flakey salt, the remaining garlic and fresh parsley.