In a small dipping bowl, add soy sauce and hot chili oil to taste.
Another sauce that's good: soy sauce and hot chili paste.
Eat with pickled ginger slices! Fantastic!
You can also steam these dumplings with a bamboo steamer over boiling water, or fry them (gyoza-style) in a hot skillet. When frying, flatten the dumplings just a bit before frying them in skillet with vegetable oil, over medium-heat. Fry each batch of dumplings for at least 6-8 minutes, turning over once mid-way through cooking. Keep the heat at MEDIUM-high only, because you don't want to burn the wrapper!