Pour in the rest of the olive oil into the pan, lower the heat and stir fry the zucchini for about 2 minutes. Then peas, for another minute, followed be the chicken stock and simmer for about 2 minutes. Stir in your cream/fresh cheese, mustard and nutmeg and bring to a boil. Stir in pre-prepared chicken, cook briefly and remove from heat.
You then prepare your pasta according to manufacturer's instructions or till al dente/just cook. Drain and then mix the sauce with your pasta and voila!
Note: I made mine slightly different: didn't have zucchini so in comes canned mushrooms and some left over bacon... :p