Pine nuts are the edible seeds of pine trees. Commercially, most pine nuts are harvested from the Korean Pine; other important species include the Stone Pine in the Mediterranean area, the Colorado Pinyon and the Single-leaf Pinyon in southwestern North America. Several other species are of lesser importance. They are high in protein, and are also a source of dietary fibre. Pine nuts are considered by many to be an essential component of pesto, and are frequently added to meat, fish, and vegetable dishes. They are also used in chocolates and desserts such as baklava.