pour the double cream into a small saucepan, add the garlic and bring to a very gentle simmer, stirring constantly. Add around 100ml/3½fl oz of the pasta cooking water and the grated Parmesan and ...
Because the garlic cloves are boiled ... as I like this to be as smooth and creamy as possible, though I’m aware many people prefer a more solid mash. Stir the Parmesan in by hand and check ...