Peel, wash and quarter the potatoes, cover and cook in salted water for about 20 minutes. Clean, wash, spin dry and pluck the salad into bite-sized pieces. Mix sour cream with 2 tablespoons lemon juice.
Season to taste with salt, pepper and 1-2 tsp. sugar.
For the bacon sauce, peel the onions. Finely dice onions and bacon. Fry the diced bacon crisply in a large pan without fat. Fry the onions briefly and remove everything.
Wash the plaice, dab dry and sprinkle each with 2 tbsp. lemon juice. Heat lard in bacon fat. Season the plaice with salt and pepper and turn in flour. Lightly tap off excess flour.
Place the plaice in the pan with the white side down and fry on each side for 5-7 minutes until golden brown.
Wash the dill, shake dry, chop coarsely. Drain potatoes and let them evaporate. Mix the salad with the cream sauce. Put the plaice on a plate. Briefly toss the bacon mixture and prawns in the pan and pour over the plaice.
Sprinkle dill over it. Add boiled potatoes and salad.