Combine the lemon juice, oil, tarragon and mint, season, set aside 2 tbsp of the dressing.
Bulgur wheat salad
Heat the oil in a pan. Sauté the onion and bulgur wheat, pour in the water, bring to the boil, season with salt. Simmer the bulgur wheat over a low heat for approx. 10 mins. Remove the pan from the heat, allow to cool slightly. Mix in the dressing, cucumber and tomatoes.
Sprinkle sugar over the lemon slices, place on top of the fish fillets, season. Heat the oil in a non-stick frying pan, fry the fish with the lemon for approx. 2 mins. on each side. Drizzle the reserved dressing over the fish, serve with the bulgur wheat salad.