Place biscuits, butter and salt into TM bowl and blend 10 sec/speed 6. Press firmly into a 32 x 7cm flan tin with removable base. Refrigerate.
Place chocolate, Notella, cream, vanilla and liqueur into TM bowl and melt 5 min/50°C/speed 1. Stop and scrape down sides of bowl if necessary.
Stir through 3/4 of the toasted nuts and pour mixture over the chilled base. Garnish with remaining nuts.
Refrigerate until solid. Remove from tin and cut into thin slices to serve.