Method:
Preheat oven to 375°F.
Heat oil in a large skillet over medium heat. Add sausage and cook, breaking it up as you go, until browned and cooked through, 7 to 8 minutes. Using a slotted spoon, transfer sausage to a large bowl and set aside.
Add celery, onion and garlic to the skillet and cook until translucent. Add sage and thyme and cook about 1 minute more. Stir in broth, salt and pepper and bring to a boil. Add cornbread to bowl with sausage. Pour broth mixture over the top and mix until well combined. Transfer to a (9-inch) casserole dish and bake until hot throughout, 25 to 30 minutes. If desired, place under the broiler for a few minutes more to brown the top.