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 Bake roast in the preheated oven for 1 hour 45 minutes; add carrots, onion, and mushrooms to the oven bag and bake until vegetables are tender and roast is cooked through, about 45 minutes. Melt butter in a large pot over medium-high heat; brown roast in the melted butter, about 5 minutes per side. 2  Transfer roast to an oven bag and put into a 13x9-inch casserole dish.