The National Paralegal College reports that the test was first introduced during a 1970 U.S. Supreme Court case, Lemon v. Kurtzman.
Preheat oven to 450Â°F. Toss parsnips with oil and salt to taste in a shallow (1-inch-deep) baking pan and roast in middle of oven, turning over halfway through cooking, until golden and tender, 30 to 35 minutes total.oss parsnips with oil and salt to taste in a shallow (1-inch-deep) baking pan and roast in middle of oven, turning over halfway through cooking, until golden and tender, 30 to 35 minutes total.
1 Preheat oven to 375 degrees F (190 degrees C). If roast is untied, tie at 3 inch intervals with cotton twine. Place roast in pan, and season with salt, garlic powder, and pepper. Add more or less seasonings to taste.  Roast in oven for 60 minutes (20 minutes per pound).