Wash the lemon. Squeeze half and cut the rest into slices. Wash the fish, dab dry and dice. Sprinkle with 1 tbsp. lemon juice, cover and steam in little boiling salted water for 5-8 minutes.
Clean, wash and possibly seed the tomatoes. Cut tomatoes into strips. Wash and roughly cut the chives
Clean, wash and drain the salad. Cut into strips except for a few inner leaves. Peel and chop the onion. Lift out the fish and let it cool down a little
Mix vinegar, rest of the juice, salt, pink pepper, sugar and oil. Mix with the salad ingredients. Arrange fish on salad strips and leaves. Garnish with lemon slices
Drink: cool white wine