Wash the fish, dab dry and cut into cubes. Sprinkle with lemon juice. Season with salt and pepper. Beat the egg. Turn fish first in 2 tablespoons of flour, then in the egg and finally in breadcrumbs.
Cook pasta according to package instructions in plenty of boiling salted water until al dente. Clean and wash the leek and cut into fine rings. Heat the fat in a saucepan. Sauté the leek in it, dust with 2 tablespoons of flour and sauté. Deglaze with stock and milk, bring to the boil and simmer for about 5 minutes. Add cheese and let it melt. Season with salt and pepper. Heat oil in a pan. Fry the fish cubes for about 5 minutes while turning. Wash the dill, dab dry and cut finely, except for a little bit for garnishing.
Season with salt and pepper. Heat oil in a pan. Fry the fish cubes for about 5 minutes while turning. Wash the dill, dab dry and cut finely, except for a little bit for garnishing. Drain noodles and mix with leek vegetables. Arrange fish cubes on plates and sprinkle with dill. Garnish with lemon slices and dill