Cover the bottom of a springform pan with plastic wrap.
Add biscuits in the food processor, along with 4-5 Tbsps of melted coconut/cocoa oil. Process until all biscuits are turned into breadcrumbs.
Put the crust mix into the pan and spread it evenly on the bottom. Don't worry if it still looks crumbly. The butter will solidify when refrigerated and the crust will be just perfect.
Peel grapefruits and orange. Remove the inside white/transparent peels too. You'll need the pulp only. The white parts are bitter.
Add citrus pulp in the food processor. Add bananas/avocados, healthy sweetener of choice, psyllium husks, and vanilla extract. Blend well until creamy.
Pour half the quantity of the cream into the pan. Spread evenly. Add 1/2 cup berries and cover with the other half.
Decorate with the remaining berries.
Put in the freezer for 1-2 hours, then move it to the fridge for another hour. Don't serve frozen!