Add the slices to the chicken and give it a run so the slices completely cover the chicken.
In a oven proof casserole add the butter, onion and garlic and cook for 2 minutes.
Add the rice and spread it so it covers the entire pot surface.
Add the chicken things, parsley and stock+water.
Cover with a lid and place in a pre heated oven and bake at 180C for 30 minutes. After this time remove the lid and cook for further 5 to 10 minutes (when the rice is cook as your preference).
Once out of the oven give the rice a little mix with a fork, squeeze some lemon on top and serve.