Soak dates for at least 20 minutes to soften.
Blend cashews in food processor until crumbly but not completely smooth.
Add the lime juice, zest and soaked dates. Process until combined and mixture sticks together.
Next, add protein powder. Blend until mixture comes together and is mostly smooth. You may need to add a bit of water if the mixture seems too dry. It should be slightly sticky but not too wet.
Line an 8x8 baking dish with parchment paper.
Press the mixture evenly into the pan using your fingers or a wet spatula (to prevent sticking).
Top with a sprinkle of unsweetened coconut and finely chopped cashews. Press into the mixture gently so that the coconut and cashews adhere to the surface.
Place in the freezer for at least a half an hour and cut into 8 bars.