Unroll the pastry and cut the pastry into 20 equalsquares. Place the pastry squares onto a lined baking tray and brush with egg.
Bake for 10 minutes, turn down the heat to 160° C and bake for a further 5 minutes.
Remove from the oven and set aside to cool.
To make the ganache, warm the cream in a small saucepan, add the chocolate and whisk together until combined. The ganache should be silky and smooth. Set aside.
Top half the pastry squares with caramel treat and sandwich with the remaining pastry squares. Top with ganache and serve.