Add all of the ingredients for the tart crust to a mixing bowl and stir until a sticky ball forms. 

Distribute crust mixture among a 12-hole muffin pan and press firmly into the bottoms and sides of the holes, creating thick tart crusts (Note: You can also use ten 2-1/2 inch tart pans or one 10-inch spring form pan). Place muffin tray in the refrigerator while you’re preparing the pie filling.

Add all of the ingredients for the pie filling to a blender or food processor. Blend until completely smooth. 

Pour the key lime pie filling into the prepared muffin pan and use a knife to smooth out the mixture. Freeze for 30 minutes or refrigerate for at least 2 hours. If using a muffin tray, run a paring knife along the edge of the crust and the muffin pan in order to release the tarts. Serve with unsweetened shredded coconut and lime zest.