Coffee mousse with tahini chocolate sauce

Ingredients

• 1½ tbsp instant coffee powder (not granules)
• 1½ tsp cocoa powder
• 1 tsp vanilla bean paste
• 2 egg whites
• 90ml maple syrup
• 280ml double cream, chilled
• 50g roasted and salted mixed nuts, roughly chopped
• 5 amaretti biscuits (the hard variety), roughly chopped
• 90g tahini, very well stirred
• 60ml maple syrup
• 1½ tsp soy sauce
• 1½ tbsp cocoa powder
• ¾ tsp vanilla bean paste
• 2¼ tbsp water