Line an 8x8 inch square baking pan with parchment paper, ensuring it covers the bottom and sides for easy removal later.
In the bowl of a food processor, combine the pecans, 1 cup of coconut, dates, 1 teaspoon of vanilla, and a pinch of salt. Pulse until finely chopped and the mixture holds together when squeezed in your hand. This texture is crucial for a solid base. Press the mixture evenly into the prepared pan and place it in the freezer to firm up.
Without cleaning the food processor, add the cashews, the remaining 1 cup of coconut, 1/2 cup of water, and the remaining 1 teaspoon of vanilla. Pulse until the mixture is smooth and creamy. You want it to be spreadable but still thick.
Remove the base layer from the freezer and pour the creamy cashew mixture over it, spreading it evenly. Carefully layer the sliced bananas on top, ensuring they cover the entire surface.
In a separate bowl, whisk together the melted coconut oil, cocoa, and honey until smooth. Pour this rich chocolate mixture over the bananas, ensuring an even coat.
Place the entire pan back in the fridge and chill for at least 1 hour, or until the bars are firm and set.
Once firm, remove the bars from the pan using the parchment paper. Place them on a cutting board and cut them into squares or rectangles, depending on your preference.
Serve topped with fresh bananas and a sprinkle of hemp or sesame seeds for an added crunch. These bars keep well in the fridge, so feel free to make them ahead of time!