Stir Fry Sauce

1/4 cup light soy sauce

1/4 cup water

½  cup vegetable or chicken or beef stock

1 teaspoon sesame oil

½ Tablespoon rice vinegar

2 cloves garlic, minced

1 - 2 teaspoon grated ginger

1-2 Tablespoon sugar or honey

1 Tablespoon cornstarch

Pinch red pepper flakes, optional