Crispy Roasted Potatoes

Kosher salt

baking soda

(about 2kg) russet or Yukon Gold potatoes, peeled and cut into quarters, sixths, or eighths, depending on size (see note)

extra-virgin olive oil, duck fat, goose fat, or beef fat

Small handful picked rosemary leaves, finely chopped

medium cloves garlic, minced

Freshly ground black pepper

Small handful fresh parsley leaves, minced