Preheat your oven to 425°F (220°C). A hot oven is crucial for achieving that crispy exterior.
Peel the russet potatoes and cut them into evenly sized chunks, about 1 to 1.5 inches. This ensures that they cook uniformly.
Place the cut potatoes into a large pot and cover them with cold water. Add 1 tablespoon of kosher salt and bring to a boil. Cook for about 10 minutes, or until the potatoes are just tender but not falling apart.
Carefully drain the potatoes in a colander and allow them to steam for a few minutes to dry thoroughly.
Return the potatoes to the pot and sprinkle with baking soda. Gently toss to coat, creating a rough surface for crisping.
Transfer potatoes to a mixing bowl. Drizzle with extra-virgin olive oil or duck fat, add remaining kosher salt, minced garlic, black pepper, and herbs. Toss until well coated.
Spread potatoes out in a single layer on a large baking sheet, ensuring enough space for air circulation.
Roast in the preheated oven for 30 minutes. Flip the potatoes carefully and roast for another 15-20 minutes until golden brown and crispy.
Remove from oven and serve immediately. Best enjoyed fresh and hot.