In a large stockpot, bring 2 gallons of water to a boil. Add the washed quahogs
and boil until the liquid is reduced by half, approximately 10-15 minutes.
Remove the quahogs and set aside. Also set aside the cooking liquid in a small
container.
In the same stockpot, saute the celery, onions and salt pork or bacon for
approximately 6-8 minutes, or until the celery and onions are moist and
translucent. Be careful not to let the mixture burn.
Add the garlic and butter, and mix well. Add the flour and stir until it forms a
paste. Slowly add the quahog liquid and stir until smooth and free of lumps. Add
the thyme, black pepper and bay leaves. Let boil for 3 minutes. Add the heavy
cream and stir slowly.
Remove the quahogs from the shell and chop to your liking. Add the chopped
quahogs to the stockpot.
Place the potatoes in a separate pot. Add water to cover and boil until the
potatoes are soft enough to pierce with a fork but don't break apart. Drain the
potatoes. Add to the chowder, stir and serve.