Step 1: Preheat oven to 375°F (190°C) and line a baking sheet with parchment paper.
Step 2: In a large skillet over medium heat, cook sausage until browned, breaking it into small pieces.
Step 3: Add onion, celery, and garlic to the skillet and cook until vegetables are softened, about 5-7 minutes.
Step 4: In a large mixing bowl, combine bread cubes, parsley, sage, thyme, and black pepper.
Step 5: Stir in the cooked sausage mixture until well distributed.
Step 6: Mix in beaten eggs, chicken broth, and melted butter until the mixture holds together when pressed.
Step 7: Using damp hands, form mixture into 2-inch balls and place on prepared baking sheet.
Step 8: Bake for 25-30 minutes until golden brown and crispy on the outside.