Sauté the coriander seeds in frying a pan and put these in the mortar. Finely crush the coriander seeds and add half of them to the cola. 

Boil the cola to 1/5 volume and allow it to cool. 

Brush the Apritos with the cola syrup and place them in the grill.

Grill the Apritos both sides for ± 6 minutes. 

Sprinkle with some coriander on top and serve.