1. Batter: Mix the flour, baking powder and salt. In a separate bowl, whisk the amasi and eggs together, then add to the flour mixture. Whisk until smooth. Add the soda water and mix well. Leave to rest for at least 30 minutes.
2. Chips: Heat oil for deep- frying in a pot or sauce-pan. Cut the potatoes into chips. Deep-fry in batches until golden brown and crispy. Drain on paper towels and season with sea salt.
3. Fish: Season the fish all over with salt and freshly ground pepper. Sprinkle the paprika, cayenne pepper and herbs all over the fillets, then roll each in the flour to coat, shaking off excess flour.