Good-Cooking - Quick Beef Burgundy

Ingredients

• 1 (2 to 2 1/2 pound) package fully-cooked, boneless
• beef pot roast with gravy
• 10 ounces uncooked egg noodles
• 1 pound small mushrooms
• 2 small onions, cut into thin wedges, separated
• 2/3 cup Burgundy or dry red wine
• 3/4 teaspoon dried marjoram leaves, crushed
• 1 tablespoon cornstarch dissolved in 3 tablespoons water
• Chopped fresh parsley (optional)