If you buy a large family size chicken and there is some leftover, here is what I sometimes do with it.
Chicken in cream and pesto sauce with tagliatelle
You will need
The chicken cut into small slices or cubed
An onion peeled and sliced
2 tablespoons of green pesto sauce
Half a carton of either double cream or creme fraiche
A splash of white wine if desired
Olive oil to cook with
Salt and pepper to taste
Fry the onion until translucent in a little olive oil. Add the chicken, pesto sauce, cream, wine if using and the salt and pepper. Heat through on a low heat for about 10 minutes, about the time the tagliatelle needs to be cooked in boiling water.
Mushrooms would be a good addition if you have some in the fridge or in a tin.