Start by preparing the bouquet garnish.
Combine bay leaf, black peppercorn, garlic, fresh thyme and wrap in a cheesecloth.
You can skip this step and just add the seasoning separately.
In a nonstick thick-bottomed pot, sauté onions, celery, and corn for about 7 minutes on low-medium heat.
Do not wait until the vegetables change color; just sauté them.
Add garnished bouquet (or separated seasonings), clam juice, and chopped clams.
Bring to a boil. Cover the pot and simmer for 20 minutes on medium heat, stirring occasionally.
Add heavy cream, salt, and ground black pepper; go gently and check the taste.
Simmer for another 20 minutes.
In a separate cup, combine cornstarch and water until the mixture is consistent and completely dissolved.
Pour the mixture into the pot and stir gently.
Cook for another 5 minutes.