In a large cast-iron or other heavy skillet, heat oil over medium-high heat; cook and crumble pork until browned, 4-6 minutes. Stir in soy sauce, garlic and seasonings. Add cabbage and carrots; cook until vegetables are tender, stirring occasionally, 4-6 minutes longer.
Cook rice noodles according to package directions; drain and immediately add to pork mixture, tossing to combine. Sprinkle with green onions. If desired, serve with additional soy sauce.