Cotton Cheese Cake

My mom used to make very tasty cotton cheese cake.... But i cant remember how she makes it, just remember she put some hot water in a baking try while baking the cheesecake....
Mr Kuan requested me to make one of this. Here i go, my first attempt on cotton cheese cake. After the cake has cooled down, it was so soft and melt in the mouth. Mr Kuan said DELICIOUS! Somehow, after i keep it in the fridge, the cake harden and not as soft as it used to be. But the taste is still good. Guess, my family needs to keep eating chiffon cakesss and cheese cakesss in coming days :)