This recipe is delicious even when simplified. For example, any one of the garnishes (sesame seeds and green onions) are optional. And the red pepper flakes can be skipped as well. Substitute the vegetable oil for extra sesame oil and you’re down to 6 ingredients. TIP Freeze whole, fresh ginger root (peel on) in a freezer bag and grate it frozen, peel and all, on the fine (zesting) side of the grater. Grate as much as you need and put the rest back into the freezer for next time.