01 - Preheat oven to 350°F. Grease a 9-inch springform pan with butter or oil and line the bottom with parchment paper for easy release.
02 - In a large mixing bowl, whisk together ricotta cheese, eggs, olive oil (or melted butter), vanilla extract, lemon zest, and lemon juice until completely smooth and creamy.
03 - In a separate medium bowl, whisk together granulated sugar, all-purpose flour, baking powder, and sea salt until evenly distributed.
04 - Gradually add the dry ingredient mixture to the wet ingredients, folding gently with a spatula until just combined. Avoid overmixing to prevent a tough texture.
05 - Pour batter into the prepared pan and smooth the surface with an offset spatula. Evenly sprinkle sliced almonds over the top. Bake for 35 to 40 minutes until golden brown and a toothpick inserted in the center comes out clean.
06 - Let the cake cool in the pan for 15 minutes before releasing the springform ring. Transfer to a wire rack to cool completely. Dust with coarse sugar or powdered sugar just before serving.