Pulse all ingredients in a food processor until sticky crumbles form.
Press into a 7" parchment-lined springform pan.
To make the filling:
Add coconut shreds to food processor and blend for about 15 minutes until liquified, scraping down the sides as needed.
Add remaining ingredients. Taste and adjust for sweetness.
Pour roughly half the filling over crust.
Add a layer of fresh raspberries around the edge.
Set cake in the freezer to firm up.
To make the raspberry layer:
Add ½ cup raspberries to the food processor with the remaining coconut mixture and blend well.
Pour over coconut layer and return to the freezer for about 3 hours to solidify.
To make the whipped cream:
Scoop the solid cream into a bowl and beat with a hand mixer. Add sweetener to taste and spread on top of the cake. Garnish with more raspberries.
Notes
Store in the freezer.To serve, thaw on the counter for about 45 minutes, depending on how soft you like your cake. Just don't thaw too long or it will melt.I used a 7" springform pan, but you can use a standard 9" pan--it will just make the cake shorter.