Cook the tagliatelle in line with packet instructions (boil for 10 minutes for example for the tagliatelle we used)

Heat butter in a frying pan and cook off chopped onions on a low heat until they turn translucent

Add the mushrooms, garlic and parsley to the pan and cook for about 5 minutes or until mushrooms have softened

Add the mushrooms and onions to the tagliatelle

Plate the tagliatelle and finish with a couple of rocket leaves for decoration