Step 1

Place the beef bones and the oxtail in a large stockpot. Add the water. The bones should be completely covered with water. If not, add more. Bring to a boil and let the the bones boil while you are preparing the rest of the ingredients.

Step 2

Cut two peeled onions in half. Char each half by holding it with tongs over open flame of a gas stove or place it under the broiler. This will bring out the aroma and deepen the flavor of the broth. Repeat the same with the ginger and set aside.

Step 3

In a small skillet, lightly toast, frequently stirring, the anise pods. cloves, peppercorns, and garlic for about 5 minutes, or until fragrant. Set aside to cool.

Step 4

Check on the boiling bones in the stockpot and skim off any scum that has accumulated.

Step 5

Add the toasted spices and garlic, charred onion and ginger, daikon, cinnamon stick, and shallots to the stock. Boil for 15 minutes, then bring down to a gentle simmer.

Step 6

Add the rock sugar (optional), fish sauce, salt, and stir well. Continue to simmer for 2½ hours, uncovered, periodically skimming off any scum or fat as they accumulate. The broth will be ready to eat after 2 1/2 hours,  but the longer you simmer the better it will become. Continue simmering, covered, for up to 10-12 hours in total for the ultimate pho bo.

Step 7

When the broth is done cooking, remove the pot from the heat and set aside to cool a little. Remove the bones and oxtails and set aside. You can use the meat and the bone marrow in the soup. Strain the broth through a fine mesh strainer into a new stockpot. The broth should be richly colored but clear. Bring the broth back to gentle simmer.

Step 8

Fill a large pot with hot tap water. Soak the rice noodles in the water for about 10 minutes. They should soften just slightly: the hot pho broth will cook them the rest of the way.

Step 9

Drain the noodles and place them in six individual soup bowls. Arrange the sliced raw beef on top, followed by thinly sliced onions and scallions.

Step 10

Slice the oxtail meat and add it to the bowl as well as any of the bits of meat and bone marrow taken from the bones.

Step 11

Pour the boiling hot broth into the soup bowls, making sure it covers the raw beef. The broth will cook the beef as well as the noodles. Give it a few minutes to do so, then serve with the pho garnish platter. A squeeze or two of lime juice will help cut the richness of the broth. The sauces can be added to the pho bo or used as a dipping sauce for beef. Using them as a dipping sauce will prevent from spoiling the wonderful flavor of the broth.