1. To a large pot over medium heat, add the butter and oil. Add the onion, carrots, celery, cooking about 5-7 minutes. Stir in the garlic, thyme, bay, tomato paste, paprika, salt and pepper. Cook another 1 minute. Turn the heat up to high and stir in the wine, followed by the broth and Worcestershire. Bring to a simmer, turn down the heat, cover and cook 20 minutes or until the vegetables are very soft, stirring occasionally. Remove from heat and discard bay leaves.
2. Using a hand immersion blender, blend the soup until very smooth. Stir in the lemon juice and heavy cream. Ladle the soup into bowls and top with flaked salmon and chives, with lemon wedges on the side.
I pan-fried my salmon in a little bit of oil for this recipe, but you can also bake, broil, or poach it.