Mix all the ingredients (including the other 1/2 of the lemon zest) together until smooth and well combined. If you're in a colder climate, you may need to heat the oil a bit first. Before you combine everything, make sure the ingredients are cooled (not hot), otherwise, the coconut butter will seize.
Taste and add more sweetener, if desired.
Pour atop the crust.
Chill until set and solid to the touch.
Cut and serve!
Fat: 15.8 g Carbs: 11.8 g Sugar: 4.7 g Protein: 3.3 g; Nutrition facts based on using one tablespoon of maple syrup. WW SmartPoints: 9