1. In a food processor, blend the bananas into a fine puree and add a squeeze of lemon juice to prevent them from browning.

2. In a double boiler, melt the chocolate and add it to the bananas. Mix well.

3. Pour the mixture into glasses and refrigerate for 45 minutes.

4. The mixture will solidify slightly due to the starch in the bananas.

5. Before serving, crumble the biscuits on top of the dessert.