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.
3. Oven-roasting the tri-tip roast. 1  Place roast in the oven and roast, uncovered, for 30 to 35 minutes or until the thermometer registers 135 degrees F. Remove from the oven and cover with foil.. Oven-roasting the tri-tip roast. 1  Place roast in the oven and roast, uncovered, for 30 to 35 minutes or until the thermometer registers 135 degrees F. Remove from the oven and cover with foil.