Preheat the oven to 350°F
Grease & parchment line your cake pan
Soak the cashews over night in a bowl of water or for fast soak bring them to a fast boil and let sit in the hot water for 30 minutes.
Prepare the cake recipe as per the recipe instructions on that blog post (bake into 1-8" cake pan)
Heat the coconut milk with the agar and bring it to a boil (be sure to keep this warm or the agar will set the milk- if that happens though, just rewarm it to dissolve again)
Combine the soaked & drained cashews, raspberries, jam, confectioner's sugar the warm agar-coconut milk, melted cocoa butter or coconut oil and melted white chocolate in a high speed blender of food processor and blend smooth on high for about 45 seconds to 1 minute or until there are not traces of cashews in the mixture, Transfer to a large mixing bowl
Whip the aquafaba with a balloon whip attachment to stiff glossy peaks and then fold into the raspberry mixture
Pour half of the mousse into the prepared mold, then slice your cake layer into 2 layers & trim it slightly smaller in diameter than the actual ring mold (this is so the cake will not show through the sides after unmolding) *see video demo
One layer goes into the center and then the rest of the mousse on top.
*Optional to add more fresh raspberries to each layer as I did in the video
The other cake layer goes on top, press down firmly so the mousse will come up around the sides (as shown in the video) and refrigerate until set at least 5 hours or overnight.
Prepare the ganache recipe according to the instructions on that post/recipe and then unmold the cake and ice with cooled but still pour-able ganache as shown in the video