Preheat oven to 375

Brown sausage and remove from pan. Drain grease.

Add butter to pan and melt over medium heat. Add onion and celery and cook until softened. Add apple and cook until softened. Add herbs and stir.

Pour mixture from pan into oven-safe dish. Add sausage and croutons and mix. Pour chicken broth over mixture. Bake for 30-40 minutes.