Soy Dipping Sauce

6 tablespoons soy sauce or tamari

2 tablespoons warm water

1 tablespoon plus 1 teaspoon Asian sesame oil

1 teaspoon sugar

1/4 cup thinly sliced scallion greens

1 tablespoon plus 1 teaspoon toasted sesame seeds

2 red or green serrano chiles, thinly sliced into rings