Dry Bread in the Oven: Preheat oven to 200° F. Cut bread into 1” cubes and spread out in an even layer on a large baking sheet. Bake in the oven until bread is dried out, about 20-30 minutes.
Preheat oven to 350°F and grease a 9”x13” baking dish. Heath butter or oil in a large skillet over medium heat. Sautee onion and celery until translucent and fragrant, about 5-7 minutes. Add garlic and continue to cook for 1 minute. Add broth and scrape up any brown bits on the bottom of the pan. Season with salt and pepper to taste.