Boil water, with salt & vinegar.

Slowly add dip the eggs into the boiling water.

NOTE: the eggs must be in the room temperature atleast 2 hours before putting the water.

Cook the eggs only for 3-5 minutes to achieve soft boiled egg

Cook the eggs only for 12-15 minutes to achieve hard boiled egg.

Once the eggs are cooked till the desired stage, take them out & put them in cold water.