Work Backwards: Then-When-Given
Consider writing the Gherkin steps in reverse order.
Write the "
Then" steps first, followed by the "
When" and finally elaborate on the "
The wording in the "
Then" steps (and also some of the other steps) typically overlaps with part of the Behaviour Specification Description that already has been written.
Starting with "
Then" and copying and pasting the relevant text from the Behaviour Specification Description is a great way to focus on the goal and kick-start the process of specifying that particular behaviour.
Sometimes doing this feels too easy, but it is a sound approach — and no one ever suggested that writing the steps has to be difficult!