Boil the potatoes in boiling water (20-25 minutes), then cut into cubes.
We also cut the fish.
Cut the onion into half rings.
Cut the carrots into slices, immerse them in boiling water, and blanch for 1 minute (from the moment the water with vegetable boils). Immediately transfer to ice water.
Cut the tomatoes into slices. Add lightly (salted fish).
For the dressing, mix oil, chopped garlic, finely chopped parsley, lemon juice.