Cut the red onion into half rings and marinate for 20 minutes. For the marinade: add sugar and vinegar to the water and mix. Meanwhile, the boiled beef is disassembled into fibers, and you can cut it into cubes. Do not peel the capsicum from the seeds, cut it as small as possible.
Chop the green onions, add salt ( I have Svan), oil. Cut the bell pepper into medium cubes, squeeze the onion from the marinade and put it in a salad bowl. Mix the salad.