Preheat oven to 350°F. Melt butter in large skillet on medium heat. Add onion and celery; cook and stir 5 minutes. Stir in sage, thyme and garlic powder.
Mix corn bread, vegetable mixture and sausage in large bowl. Add broth; toss gently until well mixed. Spoon into lightly greased 13x9-inch baking dish.
Bake 30 to 35 minutes or until heated through and lightly browned.