Crack an egg on to a saucer. Fill a saucepan with water and add vinegar and 1 tsp salt. Bring to the boil over medium-high heat. Reduce heat to low-medium. Fill a bowl with cold water and set aside. Using a wooden spoon or whisk, stir simmering water in one direction to create a whirlpool. Slide egg from saucer into centre of whirlpool, as close to water as possible. Cook for 2-3 minutes, without stirring. Using a slotted spoon, transfer egg to the bowl of cold water. Remove and drain on paper towels then serve on fresh toast with cracked peper and chopped herbs.