Step 1: Preheat your oven to 350°F (175°C) for even baking.
Step 2: Line a 9x13 inch baking pan with parchment paper.
Step 3: In a large mixing bowl, combine cashews, almonds, pecans, walnuts, and pepitas. Add salt and cinnamon, then mix well.
Step 4: In a separate bowl, whisk together coconut palm sugar, blue agave, and vanilla extract until dissolved.
Step 5: Pour the wet mixture over the dry nuts and mix until well coated.
Step 6: Transfer the mixture to the baking pan and press down firmly and evenly.
Step 7: Bake for 20-25 minutes until edges are golden brown.
Step 8: Let cool completely in the pan, then cut into desired sizes.
Step 9: Optional: Melt dark chocolate and drizzle over bars, then let set.