This is an adaptation of the recipe available in the Atkins cookbook. Having had poor luck with it the first time around, and with no vanilla bean on hand, I changed a few things around to see how they worked out.
In a food processor, blend all ingredients on high for 90 seconds to three minutes. Eyeball the mixture to make sure there are no chunks of cheese. (The cookbook calls for a blender to be used for 15 minutes.).
The original recipe calls for the use of a springform pan; failing that, use an 8" x 8" metal pan (as you might use for cakes or brownies). In either case, the pan you use will have to be put in a larger pan or dish that will function as a bain-marie.
Get some water on the boil.
Place the baking pan into the dish/pan-cum-bain-marie WITHOUT water and pour the cheesecake mixture into the baking pan.
Add the hot/boiling water to the larger vessel.
Place at or near the center rack.
Bake for one hour.
Turn off the oven and leave the cheesecake inside it for an hour more.