Lemon/peppermint avocado dessert slice

It's avocado season here in New Zealand and I was given a nice bunch of large home grown avocados and lemons recently. Of course, they all ripen at once...and since my flatmates had never tried avocado mousse and I had a day off, I chucked some ingredients in the blender and this is the result. It can't get much easier as far as making a nice dessert goes. Makes around 12 cubes of deliciousness. Enjoy :)

BASE INGREDIENTS

• 1 cup roasted (unsalted) almonds
  
• 2 cups dates, soaked for 1 or more hours
  
• 3 tablespoons cacao powder 
  
• 1/4 cup coconut oil
• 2 pinches salt

TOPPING INGREDIENTS

• 4 large, ripe avocados, pitted
• 1 banana
• 1/3-1/2 cup maple syrup (or agave if you are a raw food purist. I don't have a super sweet tooth, so I'd normally just go for 1/4-1/3 cup...you can always taste test and add more if you desire)
• 1 teaspoon peppermint extract 
• 1 teaspoon vanilla extract
• Zest AND juice of 3 lemons (mine were super juicy)
• pinch of salt

CHOCOLATE TOPPING

• 2 tablespoons coconut oil
• 1 tablespoon cacao powder
• 1 teaspoon maple syrup or agave

DIRECTIONS

1. Line a square baking dish with baking paper.
2. Place the almonds in a food processor and blend until fine. Add the rest of the base ingredients and blend (you'll need to stop and scrape down the sides a few times) until nice and smooth. Pour and press this into the baking dish and let it chill in the freezer.
3. Place all the topping ingredients into the food processor (I find a blender gets it smoother) and blend into silky smooth. Taste test it and add any more flavour/sweetener you wish.
4. Take the base out of the freezer and pour this on top.
5. Put it into the refrigerator or freezer and let it chill for at least 3 hours (the refrigerator makes a nice moussey texture whereas the freezer will be a more solid ice cream type slice). You might like to take it out after an hour or so to cut it into slices.
6. If you would like to decorate the slices with the chocolate topping, put all the ingredients into a mug and stir until smooth. Place into the freezer for about 15 minutes or until it starts to turn solid. Spoon onto the slice and place back into the fridge.