I had a great recipe, also using a mixture of curd cheese (? 1 lb) with cream cheese (quarter pound) which isn't as high in fat as all cream cheese. 2 beaten eggs also which helped it to set when cooked for half an hour at 150deg C. Sour cream on top, and biscuit base much better if you use ginger nut biscuits ( harder to crush unless you use a food processor. In UK main source of curd cheese was Sainsbury's but haven't made one for ages, so don't know if it's still available.