Line a slice tin with baking paper (use a dab of oil under paper to keep it in place)
NOTE: the larger the tin the thinner the slab will be
Place the nuts and dried fruit of choice in a bowl (I like to use plastic when dealing with chocolate)
Place 350g dark chocolate into dry ™ bowl
Melt 8 minutes / 50 degrees / speed 2 / MC off, pausing machine after 2 minutes, and then at 4 minutes to scrape down sides to ensure all the chocolate pieces are in the base of the bowl
Stir mix around
Add 150g dark chocolate callets or pieces and mix 7 minutes / no heat / speed 2 / MC off
Stir mix around
Pour chocolate into bowl with other ingredients and combine quickly
Pour mix into slice tin and spread out as best as you can, then tap the tin on your bench to even out the slab
Sprinkle with sea salt flakes to taste
Allow to set at room temperature in a cool area
NB: if it is a warm day, place the slab into the fridge for 10 to 15 minutes to help it start to set more quickly, then remove and place into a cool area to continue to set (leave it for a few hours if possible)
Cut into desired pieces
Store in a sealed container at room temperature in a cool spot, or if you like your chocolate cold store in the fridge
PS: with the chocolate left in the bowl make yourself (or the kids) a hot chocolate drink