Wash the fish, dab dry, sprinkle with lemon juice and season with salt. Put 3 tomatoes in boiling water, take them out and quench. Peel skin, quarter tomatoes and remove seeds.
Cut the fruit flesh into small cubes. Wash the basil, put something aside for garnishing. Pluck off the leaves and chop them coarsely. Mix 2/3 of the tomato cubes and basil, spread on the plaice fillets and roll up.
Place the plaice rolls in an ovenproof dish, add wine and 100 ml of water. Cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes. Wash the lemon, rub dry and grate the peel.
Finely crumble the toast bread. Wash parsley, chop finely and mix with lemon peel and toast. 5 minutes before the end of the cooking time add the rest of the tomato cubes to the stock. Sprinkle parsley and lemon mixture on the plaice rolls.
Clean, wash and cut the peppers into pieces. Wash and clean the cucumber, cut it in half lengthwise and slice it. Wash, clean and slice 2 tomatoes. Clean, wash and pluck the lettuce into bite-sized pieces.
Mix vinegar with salt, pepper and 1 pinch of sugar. Whip the oil into it. Mix the salad ingredients with the marinade and arrange in a bowl. Arrange plaice rolls with stock on plates. Garnish with basil and lemon wedges.
Serve with the salad. Parsley potatoes taste good with it.