For the crust, you melt the butter and pour it on the cumbs to have a consistent mixture that can set together. For the filling, try to melt the white chocolate together with the butter in the microwave. At the same time, put on the gelatin with the water and let them rest for few minutes. Mean while, by using a blender try to double the size of the heavy cream adding the cheese after making it softer. Plus, pour the gelatin on the chocolate and let them set for a while.

As a final step, pour the mixture of chocolate in the mixture of cheese slowly until you have a fluffy and a well combined filling.
For the sour cream topping, in a casserole, put your eggs, sugar and lemon juice and mix them by using a blender for 30 seconds. Then, heat on medium, whisking, about 5 minutes, until the sauce begins to thicken and then add the butter gradually.