Easy Sausage & Herb Stuffing

Name: Easy Sausage & Herb Stuffing
Prep time: 10 min
Cook time: 90 min
Total time: 100 min
Yield: 8-10
Ingredients: 8 cups (400g) store-bought unseasoned stuffing cubes; 1 stick (½ cup) unsalted butter; 1½ cups diced yellow onion (from 1 large or 2 small onions); 1 cup diced celery (from 3 large celery stalks); 4 garlic cloves, finely chopped; 1 pound bulk sweet Italian sausage (i.e., sausage with the casings removed) -- see note below; 2¾ cups low sodium chicken broth; 1 large egg, beaten; 1 tablespoon fresh chopped rosemary; 1 tablespoon fresh chopped sage; ¼ cup fresh chopped parsley; ½ teaspoon salt; ½ teaspoon freshly ground black pepper