Dice the chorizo. In a large stock pot, add drizzle of olive oil and chorizo. Cook until chorizo starts to brown and releases it's oil. Remove chorizo and let drain on a paper towel. Reserve for later.
Chop celery and onion. Add to stock pot with chorizo oil and sauté until slightly softened. Season with salt and pepper.
Bundle thyme sprigs, but reserve several sprigs for garnish. Add to stockpot with seafood stalk, bay leaves, and paprika. Stir and bring to a boil.
Peel and dice the potatoes. Add to stockpot and lower heat to about mid-high. Cook until potatoes are fork tender, but not mushy. (About 20 min)
While the potatoes cook, start prepping the Herbed Parmigiana Crustini. You can find the recipe here.
Remove skin from halibut and cut into bite-sized cubes. Reduce heat to a low simmer. Add halibut and reserved chorizo to stockpot. Cook until halibut is fully white and tender.
Remove from heat and stir in heavy cream. Test and season additionally with salt and pepper to taste.
Serve in bowls. Garnish with green onions, thyme sprigs, and Herbed Parmagian Crustini.