Freezing Salmon Coulibac

I've made this recipe a number of times and love it.
https://www.deliaonline.com/recipes/main-ingredient/salmon/salmon-coulibiac
I was making it today ahead of time for friends (now chilling in the fridge ready for cooking) ... the friends have had to cancel at the last minute - can I freeze the dish at this stage? If yes would I be better defrosting fully before cooking or can I cook from frozen. Keeping my fingers crossed! Thank you in advance for the advice.
Kind regards,
Karen.