2. Step
Puncture potatoes on all sides with a fork. Coat each potato with olive oil, and season with salt and pepper. Place each potato on the end of a separate sheet of aluminum foil. Crush thyme and rosemary sprigs by hand, and place 2 sprigs of each and 1/4 of the crushed garlic next to each potato. Roll potatoes and herbs in the foil and fold over sides to seal.