01 -
Preheat oven to 450°F (232°C), or 400°F (204°C) for convection. Bring 2 quarts of water to a boil in a large pot. Add 2 tablespoons kosher salt, baking soda, and potatoes. Stir, bring back to boil, then reduce heat and simmer for about 10 minutes until potatoes are tender but intact.
02 -
While potatoes simmer, heat olive oil or chosen fat in a saucepan over medium heat. Add rosemary, minced garlic, and several grinds of black pepper. Stir for about 3 minutes, just until garlic starts turning golden. Strain oil into a large bowl; reserve solids.
03 -
Drain potatoes well. Allow to steam in the hot pot for 30 seconds to dry. Transfer to bowl with strained oil. Season lightly with salt and black pepper. Toss and shake vigorously until a thick paste forms on surfaces.
04 -
Arrange potatoes in an even layer on a large rimmed baking sheet. Roast undisturbed for 20 minutes. Use a thin metal spatula to turn potatoes, then continue roasting for another 30 to 40 minutes, flipping occasionally, until deeply golden and crisp.
05 -
Transfer hot potatoes to a serving bowl. Add reserved garlic-rosemary mixture and minced parsley. Toss gently to coat. Season with extra salt and pepper if desired. Serve immediately for best texture.