German Beef Sauerbraten

Ingredients

• 900 gr US beef Chuck Short Ribs, Boneless
• 1 teaspoon vegetable oil
• 1-1/4 cups beef broth
• 1-1/2 cups dry red wine, divided
• 2 small onions, quartered
• 4 teaspoons minced garlic
• 3 fresh thyme sprigs
• 1-1/2 cups sliced mushrooms
• 2 tablespoons butter
• 1/4 cup chopped shallots
• 1 teaspoon minced fresh thyme
• 2 teaspoons cornstarch