1. Prep by soaking cashews overnight in water.
2. In a food processor, mix the pitted dates with coconut oil and water to a smooth paste. Add the (lightly toasted) oats and spices and mix quickly again until combined. You want a slightly textured batter that comes together to a ball. Press into a small spring pan so it covers the bottom.
3. Discard the cashew soaking water. In a blender, mix cashews with mango and the rest of the ingredients, to a velvety smooth consistency. Add a splash of water if your blender has trouble making the mixture completely smooth.
4. Pour the mixture on top of the bottom layer. Place in the freezer for at least 4-6 hours. Take it out 15-20 min before serving. Decorate with lemon slices and/or berries.