In 4-quart ovenproof Dutch oven, mix all ingredients except potatoes and mushrooms.
Cover; bake 2 hours, stirring once.
Stir in potatoes and mushrooms.
Cover; bake 1 hour to 1 hour 30 minutes longer or until beef and vegetables are tender.
Notes / Tips / Wine Advice:
Quick Variation:For variety, add 1 cup diced bell pepper (any color) with the onion; omit the mushrooms. Substitute 1 additional can (14.5 ounces) diced tomatoes for the tomato sauce.