1: Bring a pan of water to a gentle boil.

2: Add the vinegar to a small cup and crack the egg in.

3: Stir the boiling water with a slotted spoon to form a vortex in the water.

4: Drop the egg and vinegar from the cup into the middle of the vortex.

5: Leave them to cook for about 3 minutes.

6: Remove eggs with your slotted spoon and season.