For smorrebrod, we need to cook a poached egg. Bring the water to a boil. Add vinegar and salt to it. Make a funnel by stirring the water with a spoon. Carefully release the egg into the funnel, breaking it right next to the funnel. It can be simpler: break the egg into some small dishes, without breaking the yolk, and send it from the dishes to the funnel, stirred clockwise with water. Cook the egg for about a minute at a minimum boil. The water should not boil. Remove the egg with a slotted spoon, place the slotted spoon over the pan and let the water drain completely. For sandwiches, I then spread the egg on a paper towel and blot it.