Chop the onion into half rings and marinate for 20 minutes. For the marinade: add vinegar and sugar to 100 ml of cold boiled water, mix and put the onion there.
In a salad bowl, cut the bell pepper into thin strips, celery into a small cube.
Cut the meat into thin strips, add to the salad. Add the spices and pour in the oil. Squeeze the onion from the marinade and put it to the salad. Mix well. Put the randomly chopped lettuce leaves in a plate, top with the lettuce. Peel the egg and cut it into thin slices, put it in a circle of lettuce. Garnish with parsley.