In a small bowl stir together Worcestershire sauce, soy sauce, oyster sauce, mirin, and chili sauce. Set aside while you prepare the rest of the ingredients.
Cook or rinse noodles according to package directions. Drain. Discard any seasoning packets. Set prepared noodles aside.
Slice mushrooms, shred cabbage and carrots, and slice green onions. Set the veggies aside.
Cut pork chops into small pieces, about ½ inch in size. Trim off excess fat and discard.
Season pork generously with salt and pepper.
Toss seasoned pork in the cornstarch to coat. Shake off excess.
Heat 2 tablespoons oil in a wok or large skillet over medium high heat.
Add diced pork and cook until golden brown, about 5 minutes. Remove from skillet and keep warm.
Cook sliced mushrooms until they release their juices and liquid has cooked off, about 5 minutes.
Add shredded carrots, cabbage and white parts of the green onions to the pan.
Cook stirring constantly until cabbage wilts and cooks down.
Add noodles to the pan and stir to combine.
Add sauce and toss everything together so the sauce coats all the ingredients.
Return cooked pork to the pan and toss with all the ingredients in the pan. Cook, stirring constantly until everything is heated through.
Serve immediately and top with a sprinkle of sliced green onions.