Soak walnuts, almonds and pecans in water for 4-6 hours
Preheat oven to 200 degrees F. Drain and rinse the nuts and pat dry them using a kitchen towel.
Pulse the nuts to a coarse form in food processor.
In the meanwhile, melt the butter in a small saucepan over low heat. Mix in the cocoa powder, vanilla essence and cinnamon. Stir to combine.
Pour this chocolate mixture over the pulsed nuts and add sunflower seeds and salt. Stir well to combine and let the cocoa powder mix coat the nuts well.
Cover the baking tray with parchment paper or foil. Spread chocolate nut mixture evenly over it.
Bake at 200 degrees for about 4 hours straight. Remove and cool on a wire rack.
I served mine with cold milk.