Wash the pollock fillet, dab dry and cut into 4 pieces. Sprinkle with lemon juice, season with salt and leave to stand for a while. Clean and wash the cauliflower and cut it into florets. Cook in little boiling salted water, covered for 10-15 minutes and let drain.
Clean and wash the peppers and leek. Cut the bell peppers into pieces, leek into fine rings. Heat the fat in a saucepan and sauté the leek and bell peppers in it. Deglaze with soy sauce and broth, cover and steam for about 3 minutes.
Add the cauliflower and Asian sauce and simmer for 1-2 minutes. Season with chilli, soy sauce and vinegar and keep warm. Whisk egg. Dab fish dry and turn first in flour, then in egg and finally in breadcrumbs.
Heat the oil in a frying pan and fry the fish pieces on each side for 4-5 minutes. Place the vegetables on a plate and arrange the fish slices on top. Serve garnished with parsley.