Blend soaked cashew nuts, coconut cream, maple syrup, cocoa powder, vanilla extract, and salt in a blender until smooth.
In a small saucepan, mix agar-agar powder with water and bring to a boil while stirring.
Once boiling, simmer for 2 minutes, then mix it into the blended chocolate mixture.
Prepare the base by mixing crushed digestive biscuits with melted coconut oil and press it into a springform pan.
Pour the chocolate mixture over the base and smooth the top.
Refrigerate for at least 4 hours or until set.
Once set, remove from the springform pan and serve chilled.