Boil and cool: carrots, potatoes, and chicken eggs.
Peel the carrots and potatoes and cut them into small cubes.
Peel the chicken egg as well and cut them into small cubes too.
Cut the onion into half rings, sprinkle with lemon juice, salt it, add ground pepper, and leave for 10 minutes to soak in spices.
Cut the apple into small cubes.
Put all the above-mentioned ingredients in a deep bowl.
Peel the mackerel, remove all bones, and cut the fillets into small pieces.
Add the fish and canned peas to the salad.
Add mayonnaise to taste and season with ground pepper and salt. Mix all ingredients and serve the salad to the table in a salad bowl.