You can add Sriracha sauce to your Pho as a topping.
Add all the toppings and squeeze the lemon over the chicken.
You can use Hoisin sauce in the topping and even in the broth. Just add an equal amount of hoisin along with the fish sauce.
Many tend to skip the fish sauce due to the pungent smell that comes from fermenting the fish. Don’t skip the fish sauce; it brings that dark flavor without adding a fishy taste or smell. You won’t be able to tell if there’s fish sauce, but you will miss the taste if it’s missing from the broth.
You can add dried chili pepper as a topping to make it a bit spicy.
You can add some more flavor and texture to your pho, just add some seasoning and let your boiled chicken seer on a skillet—an option for those who don’t like boiled chicken.