Gyoza is a traditional Japanese dish, known for its crescent-shaped dumplings that are usually filled with ground meat and vegetables and wrapped in a thin dough. The filling commonly includes ingredients such as pork, green onions, cabbage, ginger, and garlic. Gyoza can be cooked in various ways including boiling, steaming, or frying. It's often served with soy sauce, rice vinegar, and a hot chili oil for dipping.