Heat cream to scalding; mix in chocolate with whisk, stirring to melt into ganache
Spoon a dollop into each cooled tart shell; chill
Thermomix Instructions for Chocolate Filling:
Weigh chocolate chunks into TM bowl; grate for 2 seconds on Turbo at speed 2-3 times, until fine
Remove from TM bowl and place into medium bowl; set aside
Weigh cream into TM bowl; heat for 5 minutes at 90C (temperature of cream going into bowl will affect time it takes to reach 90C)
Pour cream over grated chocolate and whisk until combined; spoon dollop of thick ganache into each cooled tart shell and chill
Instructions for Caramel:
Make one batch of this Toffee Sauce Recipe (Thermomix instructions included)
Rest sauce for 10 to 15 minutes until warm and spoons into a mound on work surface or plate
Using a teaspoon, carefully ladle caramel onto top of each chilled ganache filled shell; sprinkle with finishing salt immediately to ensure it will stick to the caramel
Rest filled tarts for a good hour at room temperature; pack into a tightly sealed container and refrigerate until ready to serve