Grease a 9x13 inch pan with cooking spray. Combine peanut butter, honey, and coconut oil in a medium sauce pan and whisk over medium heat until smooth.
Add oats, shredded coconut, and all but 3 tablespoons of the chopped cashews to a large bowl and stir to combine. ***If using regular table salt, site into mixture now. If using sea salt, reserve until noted*** Add sauce mixture and stir well until everything is coated. Transfer mixture to prepared pan.
Lay a piece of tin foil over the granola mixture and press down fir my with your hands to press mixture evenly into the pan. ***If using sea salt, sprinkle sea salt over granola mixture now*** Chill 1 hour.
Cut granola into bars. In a microwave-safe bowl melt chocolate chips at medium power for about 2 minutes. Stir, then heat another 20 seconds at a time until chips are melted and smooth. Dip granola bars into chocolate and use a spoon to coat one half of the bar.
Lay bars on a greased baking sheet. Sprinkle the chocolate-covered parts of the granola bars with the remaining chopped cashews. Chill 4 hours or over night. Store chilled in airtight container wrapped individually in plastic wrap OR with pieces of wax paper between each granola bar.