Chop garlic sprinkle amongst potatoes and season with salt & pepper (I only use Himalayan Pink Rock Salt as all white salts have been processed and all the good minerals removed so all that is left is sodium)
Dot the butter amongst the potatoes and pour over 150ml cream
Mix corn flour and milk and pour over potatoes
Grate cheese over the top use as much or little as you like and season again with salt & pepper
Cover dish with foil and bake in the oven (I stand the dish on a baking tray just incase it bubbles over) for around 45 minutes then remove the foil and cook for another 10 - 15 minutes to brown