Potato and Leek Gratin

Very, very nice in taste, BUT:

• we made half a recipe as a side dish for the two of us (three including baby, but normally that doesn't really matter), and it wasn't enough at all! How is a whole recipe supposed to be enough for 4 persons as a main?

• we omitted the ham, and thought the gratin (other than the cheese crust) wasn't salty enough. Next time I'd either add salt or bacon.

• I only remembered to add the cheese once I took off the aluminium foil; which was useful, in a way, as I was able to spoon the stock mixture over the potatoes one last time. Once I had added the cheese, spooning liquid over the potatoes doesn't really work as you'd destroy your cheese crust.

• the online recipe only requires a 'carton double cream', without specifying which size carton. I image-googled a carton double cream and assumed that they meant a 300 ml carton; I only now read in the comments that the original printed recipes calls for a 142/150 ml carton. I might try it with less cream next time, but there is a danger that the potatoes will then not be submerged in liquid and therefore not cook as well as they should (see point above re: spooning over liquid).

• next time I'd definitely use double the amount of leeks and garlic