Easy Keto Stuffing Recipe

Name: Easy Keto Stuffing Recipe
Ingredients: 1 loaf keto bread (see recipe notes if using homemade keto bread); 2 tablespoons butter (plus more for baking dish); 1 yellow onion, diced; 3 celery stalks, diced; 1/2 pound ground pork breakfast sausage (any type- Sage, Spicy, etc.); 4 ounces sliced cremini mushrooms (optional); 2 teaspoons minced garlic; 1 teaspoon fresh thyme, minced; 2 tablespoons fresh rosemary, minced; 2 tablespoons sage, minced; 1-1/2 to 2 cups chicken broth; 1/2 teaspoon salt; 1/2 teaspoon ground black pepper