Preheat the oven to 170°C (340°F). Grease a 9-inch springform pan.
In a large mixing bowl, combine ricotta cheese and sugar until smooth.
Add eggs one at a time, mixing well after each addition.
Stir in vanilla extract and lemon zest.
Gently fold in flour until fully incorporated.
Pour the batter into the prepared pan and smooth the top.
Bake for 50–60 minutes or until the center is set and lightly golden.
Allow the cheesecake to cool completely at room temperature.
Refrigerate for at least 4 hours before serving.
Dust with powdered sugar and serve chilled.