Bring a large pot of water to boil.
Place a fine-mesh sieve over a small bowl and crack an egg into it. The yolk and most of the white will stay in the sieve, while the thin liquid part will fall to the bowl. Reserve the liquid part for another use (like scrambled eggs).
Transfer the egg to a small bowl.
Once water is boiling, turn it to low or off completely. Add one tablespoon of white vinegar to the pot and stir repeatedly to create a vortex.
Pour the egg into the middle of the vortex and set a timer for 3 minutes.
Use a slotted spoon to remove the egg once the timer is up and serve immediately.