Make several incisions in the chicken flesh and insert the garlic.
Melt the butter in a large frying pan then add the chicken and fry quickly until golden brown on both sides.
Add the water carefully and sprinkle with salt and pepper to taste. Cover with foil and simmer for 40 minutes until the liquid is absorbed. Turn the chicken breasts once during cooking.
Meanwhile; make the cheese sauce with the milk according to packet directions.
Pour the cheese sauce over the chicken then add the grated cheese on top. Sprinkle with the crisps then put under a low preheated grill for 10 minutes until golden brown.