Heat a large skillet over medium heat. Add the sausage and cook, stirring often to crumble, until cooked through. Do not drain
Add the coleslaw mix, garlic, ginger, water chestnuts, and soy sauce to the skillet with the sausage. Cook for 3-4 minutes or until cabbage has softened a bit.
Remove from the heat and top with the green onions and drizzle with sesame oil.