Heat the oil in a non-stick pan, add the garlic and fry for a few seconds. Add the calamari, prawns, fish and wine, and cook for a few minutes.
Next add the steamed shellfish. Cook for a few more moments and add the parsley just before you toss the sauce with the tagliatelle.
When you are ready to eat, prepare the tagliatelle. Use a pasta machine to roll out the pasta. Cut the rolled pasta sheet into manageable lengths, then roll up each length and slice thinly.
Cook the tagliatelle in plenty of boiling salted water. Drain well, then toss with the sauce.
Serve with a drizzle of extra-virgin olive oil. This sauce should be fairly liquid, but not too wet, and it should taste of the sea. If you feel the need for some variety, you can embellish the recipe with finely diced zucchini or tomato, which should be added after the garlic, and before you add the seafood.