Place a cake ring on a flat serving plate or tray. Place biscuits into a blender and mix to a fine powder. Place crushed biscuits into a mixing bowl. Add 2-3 tablespoons of jam and knead to a dense dough (add more jam if needed).
Press the mix firmly evenly into the cake mould. Pour a little water into a saucepan and bring to the boil. Place chocolate into a metal bowl and place on top of saucepan. Melt chocolate, stirring occasionally.
Meanwhile, place tofu, remaining jam and orange juice into blender and mix to a fine puree.
Remove melted chocolate from the heat. Add tofu mix and quickly whisk together. Pour chocolate cream onto the cake base and chill for 2-3 hours.
Remove cake from the fridge. Place some cocoa powder into a mesh sieve and dust surface of cake. To remove cake from the mould, heat a kitchen towel in very hot water, wring it out and fold it around the cake mould (use gloves) for a few seconds. Then quickly lift the cake ring off.