Preheat the oven to 350 degrees F, and line a 9x13-inch baking dish with parchment paper. Set aside. In a large bowl, mix the cashews, almonds, pecans, walnuts, and pepitas.
Pour the Wholesome!™ Coconut Palm Sugar, Agave, vanilla extract, sea salt, and cinnamon in a large sauce pot. Bring to a simmer and stir to dissolve the sugar. The moment the sugar is completely melted, and the edges are bubbling, turn off the heat and pour in the nuts. Quickly mix the nuts into the syrup with a wooden spoon, until they are completely coated. Pour the nut mixture out onto the prepared baking sheet. Use a piece of wax paper to press the mixture firmly together.
Bake the nut bars on the center rack for approximately 20 minutes until the tops are golden. Then (this is the hard part) allow the nut bars to cool for at least 45 minutes in the pan.
Lift the whole pan of nut bars out of the pan, by the edges of the parchment paper. Cut into 24 bars. Spread the bars apart. Break one 4 ounce bar of dark chocolate into pieces and place over a double-boiler to melt. Once melted, pour the chocolate into a plastic bag. Snip off a tiny portion of the corner, and pipe the chocolate over the bars. Allow the chocolate to dry before wrapping. Store in an air-tight container at room temperature for 1 week, or in the fridge for up to a month.
Buying nuts can be expensive - Buy them in bulk if possible. And remember, this recipe make 24 bars. Compare that to the $2-3 a piece for store-bought nut bars and the recipe ingredients are a bargain!If you don't like a particular nut, feel free to make substitutions. Just be sure to have 3 cups whole nuts and 3 cups of small nut pieces, so they hold together well.