Cook pasta in a large saucepan of boiling salted water until tender, following packet instructions. Drain and return pasta to pan. Add butter and toss lightly until melted.
Heat oil in a non-stick frying pan over a medium heat. Add prosciutto and cook, stirring often, until crisp. Add garlic and cook for 1 minute.
Whisk eggs, egg yolks and PHILADELPHIA until smooth and well combined. Add to hot pasta with prosciutto mixture.
Toss until well combined and the egg mixture clings to pasta. Divide pasta between serving bowls. Top with grated Parmesan, black pepper and a handful of rocket leaves. Serve.