Spread out the bread cubes on baking sheets (or flat clean surface). Let them dry out for 1 to 2 days until they are dry and hard (tip: I lay them out during the day and cover them at night).
Prepare
Chop up all the celery (including leaves) and onions into small pieces. Set aside.
Mince the garlic cloves. Set aside.
Fresh herbs: remove the leaves from the stems. Chop the leaves into minced size. Set aside.
Cook/Bake
Preheat the oven to 350°F (176°C).
Heat the large skillet or pan to medium-high, add butter. Allow the butter to almost fully melt.
Add celery and onion. Stir and cook for 2-3 minutes.
Add garlic and fresh herbs; mix well. Season with salt and pepper. Cook for 3-5 minutes or until fragrant.
Pour in 6 cups of broth. Bring it to a simmer.
Place the dried bread in a large pot/bowl. Pour the broth mixture over the bread in the pot/pan. Mix well. If the dressing looks/feels dry add another cup of broth (adjust to you liking).
Spray the two baking pans (9" x 13"x2") with cooking olive oil or butter.
Transfer the dressing mixture to the 2 baking pans.
Bake (uncovered) for 40-45 minutes or until golden and crispy on top.
Serve with turkey and gravy!
Note: This can be prepared a day or so ahead, do not bake, then cover and refrigerate. When ready to bake: let the dish sit at room temperature for ~1 hour. Place in the oven and finish cooking as described above.