Finely dice the onion, celery, and carrot to create a uniform mirepoix base.
Heat the ghee in a large pot over medium heat, then add the diced vegetables and sauté until softened and fragrant.
Stir in the tomato paste, dried thyme, smoked paprika, sea salt, and black pepper, cooking for 1 minute to deepen the flavor.
Pour in the dry sherry to deglaze the pot, scraping up any browned bits from the bottom.
Add the seafood stock and bay leaf, bring to a gentle simmer, and cook for 15 minutes to allow the flavors to meld.
Remove the bay leaf and use an immersion blender to process the soup until completely smooth.
Stir in the heavy cream and the lobster meat, heating through for 3-4 minutes until the lobster is tender.
Ladle the bisque into bowls and garnish with freshly chopped chives before serving.