Heat oven to 325°F Melt butter in 6-quart ovenproof covered saucepan or Dutch oven until sizzling; add beef. Cook over medium-high heat, stirring occasionally, until browned (5 to 8 minutes). Add onions, wine and hoisin sauce. Cover; bake 45 minutes.
Stir flour into tomato sauce in small bowl. Add carrots and tomato sauce mixture to beef mixture. Continue baking, covered, for 45 minutes or until meat and vegetables are tender. Serve over hot cooked spaetzle or noodles of choice.
Hoisin sauce is a thick, reddish-brown sauce made from soybeans, garlic, chile peppers and spices. It lends a sweet, spicy and salty flavor to food. Look for it bottled in the Oriental food section of the supermarket.