Steps
1. Preheat your oven to 180°C (350°F).
2. In a bowl, whisk together flour, cocoa powder, and sugar.
3. Add the egg and melted butter, mixing until well combined.
4. Pour the mixture into a greased baking dish and bake for 15-20 minutes.
5. Once baked, let it cool and then crumble it into small pieces.
6. In a separate bowl, whip the heavy cream with sugar and vanilla extract until it forms soft peaks.
7. Fold the whipped cream gently to create a fluffy ice cream mixture and place it in the freezer for at least 2 hours.
8. For the caramelized bananas, slice the banana into cubes.
9. In a skillet, melt the butter over medium heat, then add the banana cubes, lemon juice, and ginger.
10. Cook for about 3-4 minutes until the bananas are golden.
11. For the caramel sauce, combine sugar and water in a small saucepan over low heat until it melts and turns golden.
12. To assemble, place a layer of chocolate biscuit crumble in a serving dish, add a scoop of ice cream on top, and finish with the caramelized bananas and a drizzle of caramel sauce.