In a large pot with a thick bottom; heat the stove on medium-high and add the diced bacon, cook till brown but not burnt.
Add ½ of the butter to the pot, drop the heat down to medium; add the onion and celery, cook for approximately 4 minutes, constantly stirring. Cook until onions look translucent.
Add the garlic and cook for another 2 minutes.
Add the other ½ of the butter and melt in within the bacon/veggie mixture.
Add the flour to the mixture and incorporate, turn the heat down to medium/low and cook for 5 minutes (this is your roux that will thicken the “chowd-ah”.
Add the clam/fish stock stirring slowly with a whisk, it will still be pretty thick.
Start adding the cream using a whisk.
Add the potatoes, thyme and the bay leaf (cook on medium/low heat for 40 minutes).
** If you par-boil the potatoes in a separate pot you cut out waiting 40 minutes.**
Add the fish and parmesan cheese to the “Chowd-ah” cook for 30 min on low.
Fish out the bay leaf and thyme before serving