Classic Seagull salad with cheese

I remember when I was a girl, my parents and I loved to go to the canteen on Saturdays… Oh, what a special, and home-made delicious food was in those Soviet times. A lot has changed since then, but my favorite salad from childhood, called «Seagull», has remained unchanged.
In preparation, this salad is so simple that even children can cook it!
So, if you are ready, let's start cooking the classic Seagull Salad with cheese:
1) Boil hard-boiled and cut the eggs as it is convenient for you, I cut the eggs for this salad, as well as the onion in half rings (purely for aesthetic reasons, no more).
Very often I boil the eggs in the cool in advance and keep them in the refrigerator, just in case, as they say - for salads, snacks and just if one of the family members wants a snack)
2) Next, add the green canned peas from the bowl in which you prepare the salad, I use the purchased one, but if you have your own, then this will also work.
3) Cut into cubes or grate the cheese on a grater. Don't be afraid to experiment with cheese in this recipe. I have already tried a lot of options and was delighted with all of them.
4) Cut the onion. (In order to remove the burning, it is advisable to rinse with hot water or marinate for a few minutes. But not necessarily)
For the marinade, I rinse the onion in cold water several times, then add apple cider vinegar to the water with the onion (you can use the usual one), a teaspoon of sugar and a pinch of salt... while I'm cutting all the ingredients, the onion is marinated... Then I rinse it in hot water and send it straight to the salad.
5) Add mayonnaise, salt and, if desired, black pepper. Mix everything well.
PS If you don't plan to eat salad right away, then I recommend dressing the salad just before serving. You can decorate the salad with herbs: sprinkle with green onions, put sprigs of dill or parsley, or as I sprinkle the salad with grated cheese.

The salad is ready! Bon appetit to everyone. Cook with love ..