Preheat oven to 350F and grease or line a muffin tin
In a food processor, blend together graham crackers and butter. Alternatively, crush into very fine crumbs using something heavy.
Divide crumbs evenly amongst muffin tin and press down to flatten and pack using fingers.
Bake for 6 minutes.
While baking, clean food processor and then add all ingredients for cheesecake filling to clean food processor.
Blend until completely smooth.
Divide evenly amongst muffin tin and bake for 17-20 minutes or until they look set and do not jiggle.
Let cool 15 minutes before refrigerating for at least 2 hours.
Top with warmed blueberries if desired.