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.
Rub the silverside with the extra oil and sprinkle with salt and pepper. Place the silverside in a large roasting pan and arrange the parsnips and carrots around it. Cook in preheated oven for 10 minutes. 1  Step 3.educe oven temperature to 180Â°C and cook for a further 20 minutes. Transfer the silverside to a plate, cover loosely with foil and set aside for 5 minutes to rest. Return the parsnips and carrots to the oven. 1  Step 4.