In a large skillet over medium heat, melt butter. When melted, add celery, onion, and herbs. Season with salt and pepper and cook until onions are translucent, about 5 minutes. Remove from heat and let cool.
Grease the bowl of your Crock-Pot and add your cubed bread. Pour vegetable mixture, eggs, broth, and parsley over bread. Toss to combine and cover.
Cook on low for 3 to 4 hours, stirring after 2 hours have passed. Garnish with parsley before serving.
