Ariadne's New England Parsnip-Apple-Onion Bake
You can use a Macintosh apple in place of the Granny Smith apple, if you prefer.
You can use vegetable broth in place of the chicken broth.
You can add 1/2 cup shaved Parmesan or Cheddar cheese as a last-minute topping before serving warm. Or, add 2 tablespoons brown sugar and 1/4 teaspoon fresh ginger before baking for a candied parsnips version.