Belgian Beef Stew

Name: Belgian Beef Stew
Ingredients: 1/4 pound bacon, diced; 3 tablespoons olive oil; 4 pounds boneless chuck, bottom or top round, cut into 2-inch pieces; 2 large onions, sliced; 1/4 cup Cognac or other brandy; 1 teaspoon salt; 1/2 teaspoon dried thyme leaves; 1/4 teaspoon freshly ground pepper; 2 bay leaves; 3 garlic cloves, minced; 1 tablespoon brown sugar; 1 12-ounce can dark beer or stout; 1 1/2 cups beef broth; 3 slices country-style bread, crusts removed; 3 tablespoons Dijon mustard; 2 tablespoons red wine vinegar