Wash eggs, boil them hard, cool them down in cold water and shell them. Boil potato and carrot until done, cool them down until room temperature and peel them.
Peel and dice onion into small pieces. Put it into a bowl. Add half teaspoon of sugar, coriander and black pepper seeds, cloves buds. Combine cold water and table vinegar in equal proportions. Pour diced onion with this mixture and leave to marinade for 15-20 minutes.