This is a kind of western chow mein, quickly and easily prepared. A delicious way to eat tagliatelle, the soft pasta contrasting with the crunchiness of the Chinese vegetables.
Stir-fry the spring onions and ginger gently in the oil for a couple of minutes so that they soften, then toss in the prepared vegetables and stir until they heat through and begin to soften - about 4-5 minutes. Then stir in the soy sauce and heat through again, stirring all the time. Pour this mixture over the hot, drained tagliatelle in a warm serving-dish, toss thoroughly and serve immediately.