Preheat oven to 350°F. Spray a 9x9 baking pan with cooking spray.
Add the graham crackers, butter and sugar to a food processor and pulse until the mixture becomes coarse and sandy.
Dump the mixture into the baking pan and spread it into an even layer. Use the bottom of a glass or measuring cup to firmly pack down the crust. Bake for 6-7 minutes or until lightly browned around the edges. Let the crust cool while you make the filling.
Wipe out the bowl of the food processor and add all the cheesecake ingredients. Purée until smooth scraping down the sides of the bowl as needed.
Pour the filling onto the crust and smooth it out into an even layer with a rubber spatula. Bake for 30-35 minutes, or until the center still slightly jiggles. Remove from the oven and let it cool completely. Cover and refrigerate for at least 6 hours or overnight. Before serving drizzle with lemon curd, if desired.