Crust Mixture: Ensure 2 cups granola is finely crushed in plastic bag. Place 2 cups dates in a food processor. Once dates create a spreadable consistency, place in medium mixing bowl. Once dates create a spreadable consistency, place in medium mixing bowl. Add granola and simply combine with hands.
Freeze Crust: Take a 10-12inch springform pan and lightly spray bottom with non-stick cooking spray. Place date/granola mixture inside and gently spread evenly throughout the pan. Place in freezer for 10 minutes to harden.
Cashew Mixture: Place softened cashews in a blender and add ¾ cup coconut milk, ⅓ cup + 1 tablespoon maple syrup, 4 tablespoons lemon juice, and 1 teaspoon vanilla extract. Blend until until creamy and smooth.
Adjust: Taste and add additional maple syrup, lemon or vanilla to taste.
Chill: Pour 2/3 of the mixture into the cake pan and smooth out the top to ensure it is flat. Place back into the freezer.
Middle Filling: In the blender, add ¼ cup coconut milk, ½ cup blueberries, and 1 tablespoon lemon juice to the remaining cashew mixture and blend until smooth and creamy.
Chill Middle Layer: Remove cake from freezer again and pour remaining cashew mixture on top, spreading evenly on top. Place back into freezer.
Top Layer: In a saucepan, add 1 ½ cups blackberries, 4 tablespoons lemon juice, 2 tablespoons chia seeds and 1 tablespoon ground ginger. Bring to simmer, smash the blackberried and let reduce about 10 minutes. Remove from heat and let cool.
Final Freeze: Once it is cool, take cake out of the freezer again and pour blackberry mixture on top; smoothing out to ensure it is flat. Cover with aluminum foil and return to freezer, ensuring it sits flat.
Serve: Place the remaining blackberries in the freezer and remove and place on top of cake when you are ready to serve. Cake should be served chilled and even slightly frozen.
Storage: Otherwise, it will stay in the fridge for 2-3 days or in the freezer for 1-2 weeks.