Let's cook.
In a small bowl, whisk together the soy sauce, mirin, cornstarch, and water to create the stir-fry sauce. Set aside.
Heat the sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken pieces to the hot skillet and cook for 5-7 minutes, stirring occasionally, until browned and cooked through.
Add the minced garlic, shredded cabbage, and julienned carrots to the skillet. Stir-fry for 3-4 minutes until the vegetables are tender-crisp.
Pour the prepared sauce over the chicken and vegetables. Cook for 1-2 minutes, stirring constantly, until the sauce thickens and coats everything.
Remove from heat and serve immediately.
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