Method:
Preheat oven to 300°F. Spread bread cubes out on two baking sheets and bake until dried but not browned, about 15 minutes. Transfer to a large bowl.
Meanwhile, in a large skillet, heat oil over medium-high heat. Add sausage and cook, breaking up chunks with a spoon, until browned, about 6 minutes. Add apples, celery, onion and butter and cook, stirring occasionally, until apple and vegetables are softened, 8 to 10 minutes more. Add to the bread. Stir in broth, sage, salt and pepper.
If using to stuff a turkey, cool completely before stuffing. If baking separately, heat oven to 350°F; bake in a buttered casserole dish until lightly browned and crisp on top, 50 to 60 minutes.