Combine chocolate, cocoa and nutella into a microwave bowl with 2tbsp water. Microwave on high power for 60 secs Or until melted.Allow the chocolate to come to room temperature.Now mix melted chocolate, some toasted almonds, chilled yogurt, caster sugar and some ice cubes if using.Grind them into a processor until they all mix evenly.Serve chilled in tall glasses Or matkas Or metal glasses. Decorate on top with reserved toasted almond juliennes.