Get an ovenproof dish and line with tin foil. Generously season the chicken with salt and pepper and place in the in dish. Pour in the chicken stock, cream and gravy granules (or cornflour if using). Cover with tin foil.
Bake in the preheated oven until the chicken is no longer pink in the centre and the sauce has thickened, about 30 minutes. Remove from the oven and serve.
If you like you could add some bacon (2 or 3 pieces) but lardons are best. I like to serve this with new potatoes and some steamed broccoli.
Instead of using gravy granules, use a teaspoon of cornflour with a little water to thicken the sauce.