1. Stir together 1/2 cup orange marmalade and 2 Tbsp. stone-ground mustard. Brush 1 (3- to 3 1/2-lb.) corned beef brisket, fully cooked, with half of marmalade mixture, and place in a lightly greased jelly-roll pan. Bake at 425° for 30 to 35 minutes or until golden brown, basting with remaining half of marmalade mixture every 10 minutes. Serve corned beef with cooked cabbage.