Preheat your oven to 325°F (160°C).
Grease a 9-inch springform pan, ensuring the bottom and sides are well-coated.
In a food processor, pulse graham crackers until finely crushed.
In a mixing bowl, combine graham cracker crumbs, sugar, and melted butter. Mix until it resembles wet sand.
Press the mixture evenly into the bottom of the prepared pan. Use the back of a spoon to smooth it out.
In a large mixing bowl, beat the ricotta cheese until smooth and creamy.
Add the sugar and mix until well combined.
Beat in the eggs one at a time.
Mix in the vanilla extract, lemon zest, and flour until the filling is smooth and velvety.
Pour the filling over the crust in the pan.
Smooth the top with a spatula to ensure an even surface.
Bake in the preheated oven for 1 hour and 15 minutes or until the cheesecake is set but still slightly jiggly in the center.
Remove the cheesecake from the oven and allow it to cool in the pan on a wire rack for about 30 minutes.
Refrigerate for at least 4 hours or overnight for the best results.
Once the cheesecake has chilled, remove it from the springform pan.
Serve chilled, garnished with fresh berries or a dusting of powdered sugar.