Ok well this is my old recipe and its foolproof...

5-8 potatoes varies depending on size.
1 Square or rectangle glass pyrex dish (or lasagne dish/pan or similar)
600mls cream
Garlic granules
Salt & Pepper

Layer potatoes then sprinkle with garlic, salt & pepper between each layer. Then pour cream over layers till just covered.

Bake in the over at 180C for 1hour then top with cheese and bake again for another 25 mins till cheese is cooked.

This is foolproof its fattening but foolproof! If you find the potatoes are cooked before the hour (always stab in the middle with a skewer) then top with cheese and do the 25 mins.

*hugs*
Cailin