Preheat the oven to 300F and line a large rimmed baking sheet with parchment paper.
In a food processor, process the almonds and pecans until they resemble coarse crumbs with some larger pieces. Transfer to a large bowl and stir in theshredded coconut, sunflower seeds, sweetener, and vanilla protein powder.
In a microwave safe bowl, melt the peanut butter and butter together. Pour the melted peanut butter mixture over the nut mixture and stir well, tossing lightly. Stir in the water - at this point, the mixture should begin to clump toether.
Spread the mixture out evenly on the prepared baking sheet and press it down firmly with your hands. Bake 30 minutes, stirring halfway through and re-pressing it down. Remove and let cool competely.