Though it was over ten years ago, I remember eating some similar soup in Riga, though I never knew the recipe. Yesterday, it was time to use up the cauliflower and broccoli so, with the addition of 100g of Scottish smoked salmon (Scottish friends in Oman take note :D), it seemed like the ideal time to recreate that memorable taste.
Shrimp would work well as would wild forest mushrooms in place of the salmon.
Something else. The Blue cheese I used was Fourme d'Ambert, it would work with any blue cheese though. - 07 Jul 2010