Traditional Beef Pho Recipe

Name: Traditional Beef Pho Recipe
Ingredients: 2 large onions, split in half; 1 large hand ginger (about 6 inches long), split in half lengthwise; 3 pounds beef shin, with meat attached; 2 pounds oxtail, cut into 1/2 to 1-inch thick slices; 1 pound boneless beef chuck; 1 pound beef brisket; 3 whole star anise pods; 1 cinnamon stick; 1 teaspoon fennel seeds; 4 cloves; 1 teaspoon coriander seeds; 1/4 cup fish sauce, plus more to taste; 2 tablespoons sugar (preferably yellow rock sugar); Kosher salt; To Serve:; 6 to 8 servings pho noodles; 1 pound beef flank steak, sliced thinly against the grain; 2 to 3 cups mixed herbs (cilantro, basil, and mint); 2 to 3 cups trimmed bean sprouts; 1/2 cup sliced scallions; Thinly sliced Thai chilis; 2 limes, each cut into 4 wedges; Hoisin sauce and Sriracha