Instead of mincing the garlic and ginger on a cutting board with a knife, I like to use a microplane to grate them. A
standard microplane works, but for efficiency, I usually use
this coarser one as it moves through the ginger much more quickly. Or,
ginger juice can be used 1:1 for the minced ginger — add it when you add the stock.
Between the ginger, chili flakes, and pepper, this broth is pretty fiery; if you're sensitive to spicy food, start with half the amount of chili flakes.
I like to cook the orzo separately, in very-salty water, so that it is properly seasoned (the broth is barely salty before you add the miso). I also prefer to cook it in its own pot, because I can then store the leftover soup base and cooked orzo in separate containers. (The orzo will bloat and get a bit soggy if stored in the broth.) That said, if you plan to eat all of the soup at once, and don't want to dirty an extra pot, you can add the orzo to the soup to cook.
The right amount of miso to use depends largely on your stock. I used unsalted stock (
this recipe, omitting the soy sauce), and 3 tablespoons of miso was just right. Chicken stock is also a great swap for the vegetable, if you eat meat.
If you eat meat, a bit of shredded chicken is an excellent addition. In an ideal world,
poached is my preference, but
leftover roast chicken also works marvelously.