Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente. Drain then return to pot.
Heat oil in a large heavy frypan over medium heat. Saute garlic for 5 minutes. Toss in prawns and cook for 5 minutes on each side. Remove prawns and set aside. Remove garlic slices and discard.
Pour oil over pasta in pot and toss to evenly coat. Sprinkle 3/4 of the Parmesan cheese onto pasta and stir until evenly distributed. Transfer to serving dish. Arrange prawns on top then sprinkle with remaining Parmesan and parsley.