Creating Creamy Fish Chowder is a straightforward process. Follow these steps to create this incredible dish:

1. Melt Butter: In a large pot, melt the butter over medium heat.
2. Sauté Vegetables: Add the diced onion and minced garlic. Sauté until the onion is translucent and fragrant, about 5 minutes.
3. Add Potatoes: Stir in the diced potatoes and cook for 3-4 minutes.
4. Pour in Stock: Add the fish stock or chicken stock, bring to a boil, and then reduce to a simmer. Cook for about 15 minutes, or until the potatoes are tender.
5. Incorporate Cream: Stir in the heavy cream, bringing the chowder back to a gentle simmer.
6. Add Fish and Corn: Carefully add the fish pieces and corn to the pot. Cook for an additional 5-7 minutes, or until the fish is cooked through and flakes easily with a fork.
7. Season: Stir in the dried thyme, and season with salt and pepper to taste.
8. Garnish and Serve: Remove from heat, and ladle the chowder into bowls. Garnish with fresh parsley.

By following these steps, you will create a rich and savory chowder that will have everyone coming back for seconds.