Bring a large pot of salted water to the boil and cook the bucatini slightly under al dente.
Once the pasta is cooked to less than al’dente pour it into a large colander and cool the pasta immediately with running cold water (try to reserve the hot water).
Replace the reserved pasta water or fresh water into the pot and return to boil.
Pour a little olive oil in a pan and over med-high heat sauté the garlic until it is golden and remove immediately into a large mixing bowl.
Wipe the pan clean and add a little more oil, and place on high heat.
Season the thinly sliced chicken and sauté it until just under cooked and place it into the bowl with the garlic (it will finish cooking in the last stage).
Replace the pan to high heat and pour a liberal amount of olive oil into the pan and add the mushrooms, season lightly with salt and pepper and sauté until lightly browned.
With the mushrooms still in the pan over high heat add half of the chopped parsley stir with a wooden spoon and immediately deglaze the pan with a splash of white wine, continuing to stir with the wooden spoon to remove all the flavours in the bottom of the pan.
Cook for another 30 seconds or so until all the alcohol has evaporated off the wine and add it all to the chicken and garlic.
Pop the cork on a nice white, let it breathe, organise your 6 serving dishes, the parmesan garnish, and blanche the cold pasta in the boiling water until al’dente.
Drain the pasta well, add to the chicken etc, toss it all with the remaining parsley and a little more olive oil if required and divide evenly amongst the 6 dishes, garnish with parmesan shards.