2 ½ tablespoons toasted sesame oil (divided)
½ pound Shiitake mushroom, stems removed and discarded and mushroom caps sliced
1 small onion, sliced
2 large cloves garlic, minced
1 teaspoon ginger, minced
1 head Napa cabbage, halved, cored and thinly slice crosswise
2 tablespoons tamari or soy sauce
½ teaspoon pepper
1 tablespoon rice vinegar
2-3 tablespoons cilantro, chopped
2 teaspoons toasted sesame seeds