Directions See How It's Made. 1  Preheat oven to 500 degrees. Wait for a few minutes before you put your roast in, so it gets as hot as possible. 2  Put the roast in a shallow pan. (I use a cookie sheet). 3  Cut onion into thin rings, and put all over the top and sides of the roast using toothpicks if necessary.
Definition of preferential. 1  1 : showing preference. 2  2 : employing or creating a preference in trade relations. 3  3 : designed to permit expression of preference among candidates a preferential primary.  4 : giving preference especially in hiring to union members a preferential shop.
: a primary in which the voters indicate preferences for nominees for president of the U.S. directly by vote or indirectly through the choice of delegates to the presidential nominating convention âcalled also preferential primary.