1 Place the meat in a large baking dish. In a small bowl combine the garlic, soy sauce, and mirin, and pour it over the steaks. Let it marinate for 30 minutes, turning occasionally.
2 Dissolve sugar in vinegar. Arrange vegetables and ginger in a large bowl and pour rice vinegar over the shredded vegetables. Set aside for 5 to 10 minutes. Drain and squeeze out any excess moisture.
3 Heat oil in a large skillet over high heat. Add the steak and stir-fry until done to taste. For medium rarea, stir-fry for about 3 minutes on each side .
4 Remove steaks and place on warmed serving plates. Sprinkle with spring onions and serve with the marinated vegetable mixture.