Pine nuts are very expensive when you buy them at the grocery store, but they are hardly new.
People have been pine nut harvesting for centuries.
You can grow your own by planting a pinyon pine and harvesting pine nuts from pine cones. Read on for more information on when and how to harvest pine nuts.
Read more at Gardening Know How: Pine Nut Harvesting – When And How To Harvest Pine Nuts https://www.gardeningknowhow.com/edible/nut-trees/pine-nut/pine-nut-harvesting.htm