Peel the piece of ginger and grate with a box grater, then squeeze the resulting grated ginger to obtain about 1 tablespoon ginger juice and discard the grated ginger.
1 large piece fresh ginger
Whisk together in a bowl the grated ginger juice and the lemon juice.
3 tablespoon lemon juice
Whisk while incorporating the olive oil. Add the sesame oil and season to taste.
⅔ cup extra-virgin olive oil, 1 tablespoon sesame oil, Sea salt and freshly ground black pepper to taste