Prepare the crust and preheat your oven. Press your Baked Crumb Crust into the bottom of a 9 or 10-inch springform pan and bake as directed.
Set it aside to cool.
Preheat the oven to 325°F / 165°C.
Make the filling.
In a large bowl, use an electric mixer to beat the eggs and sugar together until they are light and fluffy.
Add the ricotta cheese, lemon zest, and all-purpose flour, and continue to beat until the mixture is completely smooth.
Bake the cheesecake.
Pour the ricotta batter into the prepared crust.
Bake for 45 to 50 minutes, or until the cake has pulled away from the sides of the pan but the center still has a slight jiggle.
Cool it slowly.
Turn off the oven, but leave the cheesecake inside with the door closed to cool down completely. This slow cooling process is the secret to preventing cracks!
Chill and serve.
Once cool, remove the cake from the oven.
Let it cool on a wire rack before covering with plastic wrap and refrigerating until well chilled, at least 4 hours or overnight.
Slice and serve cold.