Preheat oven to 375 degrees.
Cut the stale french bread into 1/2 inch cubes and set aside.
In a medium-size frying pan, melt butter on medium-low heat. When it begins to sizzle slightly, add garlic and cook until fragrant (about 2 minutes) Add in diced celery and onion and cook until tender (about 4-6 minutes).
Add chicken broth, salt and pepper. Cook for another minute.
Place the french bread cubes in a large mixing bowl. Pour the pan mixture over the bread, stirring until well coated. The bread should be thoroughly wet, but not soggy.
Add in egg and stir until evenly distributed.
Place mixture in a glass baking dish and bake until golden brown on top, 40-50 minutes.
Sprinkle with minced fresh parsley and thyme. Serve immediately.
