Prepare all ingredients for the Yakisoba. Slice all vegetables into even slices. Cut beef into thin strips. Reheat Yakisoba noodles following the package instructions.
In a lightly oiled Wok, cook all the vegetables separately on high heat until they're golden brown. Set aside in a bowl.
To the same Wok or a skillet, add more oil and brown the beef slices on all sides. Add vegetables to the beef mixture.
In a separate bowl, combine together sugar, soy sauce, oyster sauce, ketchup and Worcestershire sauce. Pour the sauce over the cooking ingredients, let it cook together for 2-3 minutes. Add Yakisoba noodles to the mix, let it cook together for 5 minutes.