In a large bowl, combine cornbread, broth and butter. Mix well and set aside. In a skillet over medium heat, sauté onion and celery in oil until softened, 4 to 5 minutes. Add onion mixture to cornbread mixture along with seasonings; mix well. Let stand for 15 minutes. Fold eggs into cornbread mixture; transfer to a greased 2-quart casserole dish. Bake, uncovered, at 375 degrees for 50 to 65 minutes, until top is golden.