Heat the olive oil in a large frying pan and sizzle the pancetta or bacon for about 5mins until starting to crisp.
Turn up the heat and add the grated courgette to the pan. Cook for 5mins or until soft and starting to brown.
Add the garlic and cook for a minute longer. Season and set aside.
Cook the tagliatelle according to the pack instructions and scoop out a cupful of cooking water. 5. Drain the tagliatelle and tip into the frying pan with the bacon and courgette.
Over a low heat toss everything together with the crème fraiche and half the Parmesan adding a splash of pasta water too if you need to loosen the sauce.
Season to taste and serve twirled into bowls with the remaining Parmesan & chopped parsley scattered over.