Pour three to four inches of water into a large pot. Bring water to simmer.
Add the salt and the vinegar to the water
Crack one egg into a recipient, and put it carefully into the simmering water.
Using a slotted spoon keep bringing the eggs whites together. It will look messy, but no worries, it will be ok :)
Cook it for 1 minute, and then use the slotted spoon to remove the eggs from the water.
Serving suggestion: Toast 2 english muffins, spread butter, add the avocado and the smoked fish.
Put the egg on top of the smoked fish, then add one slice of avocado and some fresh parsley to give it some color :D