Heat oil in a large skillet over medium-high heat. Add in the celery and onion and cook until soft and tender. This is really important as they will NOT soften in the dressing, you must cook them to your desired softness now.
Add in bread crumbs and parsley, mix them in and remove the skillet from the stove.
Add oysters, eggs, salt and pepper, poultry seasoning and thyme.
Carefully add in just enough oyster liquid to allow you to moisten the ingredients and mix them all together.
Once mixed, transfer to the waiting 9x13 pan.
Bake in the oven for approximately 45 minutes or until the top looks golden brown and a toothpick or knife inserted in the centre comes out clean.
You can also add in chopped giblets from the turkey and a small amount of broth if desired to give this a little flavor boost!
You want bread crumbs that are a mixture in size, from small to some medium, to some large pieces.