Pine nuts are mainly produced in Europe mostly from the Stone Pine tree that has been cultivated for over 6,000 years. Pine nuts are labor intensive, in that each small nut has a thick, protective hull, which needs to dry and then cracked open. They are frequently added to meat, fish, salads and vegetable dishes or baked into bread. They are an essential ingredient in making the famous Italian pesto sauce. Add them in your salad mix, use them for adding texture in baking, or crush and use them in making rich sauces.