Wash the potatoes and cook in plenty of boiling water for about 20 minutes. Wash the asparagus, cut off the woody ends, cut the asparagus spears in half lengthwise and cut into pieces. Cook in boiling salted water for about 4 minutes. Drain and rinse immediately in cold water
Meanwhile, for the vinaigrette, peel and finely dice the onion. Heat 1 tablespoon of oil and briefly fry the onion cubes in it until translucent. Whisk vinegar, salt, pepper, mustard and honey. Add 5 tbsp. oil drop by drop. Stir stock and onions into the vinaigrette. Wash the salad, shake dry and chop coarsely
Drain the potatoes, rinse under cold water, drain, peel, slice and carefully toss in the vinaigrette. Fold in the asparagus and chill the salad
For the filling, wash the dill, shake dry, pluck flags from the stalks and cut finely. Mix sour cream, 2 tablespoons breadcrumbs, shrimps and dill evenly. Season to taste with salt, pepper and lemon juice
Wash the plaice fillets, dab dry, place them next to each other on the work surface, season with salt and pepper. Spread the filling over the fillets and fold them up. Whisk the eggs in a deep plate. Turn filled fillets one after the other in flour, 150 g breadcrumbs and eggs
Season potatoes with salt, pepper and vinegar, fold in salad. Heat clarified butter in a large frying pan and fry the plaice fillets for about 6 minutes in portions. Keep finished fillets warm. Arrange fillets and salad