Today’s writing prompt at dVerse Poet’s Pub is for every poem to begin like this:
Once upon a _________ (you fill in the blank with any word except “time”) So a poem starting with Once upon a time would NOT fit the prompt! BUT, poems starting like this, for example, do fit the prompt:
Once upon a lily pad
Once upon a glimmer
Once upon a noodle
Once upon a midnight, etc…
Once upon a shot
I took my best and missed; the
one who got away.
Ergo, the Ogre 
Tell it like it is