Place all nuts on lined baking tray that is big enough to spread them out. Place into cold oven set to 200ºC and cook 8 minutes. Remove from oven and whilst still warm, mix with pretzels and sprinkle generously with salt. Allow to cool.
Place all remaining ingredients except egg white and chocolates into Thermomix bowl and cook 5 min/Varoma/speed 2.
Beat egg white with a balloon whisk or other means. (I know…shock, horror.) You can beat in Thermomix, but you may need to beat more than one to get any luck!
Add beaten egg white to Thermomix bowl and blend 5 sec/speed 6.
Pour over nuts and pretzels. Stir to coat evenly. Return to the oven for 8 minutes. When you remove them from the oven, stir to break apart, you may need to use two trays to have them be separate. The nut mixture will harden as it cools.
Stir through Chocolates of choice once the mixture is fully cold and serve.
Store in the fridge until you serve. It will keep for several months.