Bring a large pot of water to a boil.
Meanwhile, gently scrub the potatoes to remove any dirt. Be careful to not break the skins.
Once the water is boiling, add 1 teaspoon of salt and the potatoes. Boil for 15-20 minutes, until potatoes are just fork tender. Drain potatoes into a colander. Set them aside for 5 minutes to allow extra water to evaporate and to let the potatoes cool slightly.
Meanwhile, preheat oven to 425° F with a rack in the upper third of the oven.
Grease a large rimmed baking sheet with olive oil.
Spread the potatoes out on the baking sheet. Use a large fork or greased potato masher to gently smash each potato to ½-inch or a little less than ½-inch thickness. Thinner potatoes will turn out crispier, and thicker potatoes will be fluffier.
Pour the 2 tablespoons olive oil into a small dish and brush over the potatoes. Sprinkle the potatoes with the garlic powder, onion powder, up to ½ teaspoon coarse salt and pepper.
Bake potatoes for 25-30 minutes, until golden brown and crispy. Serve immediately, garnished with chopped fresh herbs, if desired.