====== GYOZA SAUCE ======

  * 4 tbsp rice vinegar
  * 4 tbsp soy sauce
  * 2 garlic cloves pressed or finely chopped
  * 1 tsp finely chopped or grated ginger
  * 1 green onion finely sliced
  * 1 tsp sesame oil
  * 1/4 tsp chili flakes