Pack Tennis biscuits into a dish that is at least 5cm deep in one layer. It helps to use the Tennis biscuits which are square in a rectangular dish. I do cut some biscuits smaller if needed. *** See note
In a large bowl, whip the cream to the soft peak stage. It should not be too stiff or dry.
Empty the contents of the tin of caramel into another bowl and loosen the caramel with a whisk or spatula. Now fold the caramel into the cream.
Spread a 1 to 1,5cm thick layer of caramel cream over the base layer of biscuits.
While still in the foil wrappers, crush the Peppermint Crisp bars by bashing them with a rolling pin on a wooden board. Use your fingers to break up larger pieces if necessary.
Sprinkle as much crushed chocolate over the caramel cream as you desire.
Continue layering biscuits, caramel cream and crushed chocolate as many times as you like, ending with a nice evenly thick layer of crushed chocolate. I sometimes also sprinkle the top with a light dusting of cocoa powder.
Cover the tart and refrigerate for at least 8 hours, preferably overnight.