01 - Preheat oven to 350°F. Grease a 9-inch springform pan and line bottom with parchment paper.
02 - Whisk ricotta cheese, eggs, olive oil or melted butter, vanilla extract, lemon zest, and lemon juice in a large bowl until smooth.
03 - Mix sugar, flour, baking powder, and salt in a separate bowl.
04 - Gradually fold dry ingredients into wet mixture until just combined. Avoid overmixing.
05 - Pour batter into prepared pan, smooth top, and sprinkle sliced almonds evenly over surface.
06 - Bake for 35 to 40 minutes until toothpick inserted in center comes out clean and almonds are golden.
07 - Cool in pan for 15 minutes, then release springform and transfer to wire rack to cool completely.
08 - Dust with coarse sugar or powdered sugar before serving.