01 - Preheat oven to 350°F. Grease and line a 9-inch round cake pan with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
03 - In a large bowl, beat butter and sugar until light and fluffy, about 2-3 minutes.
04 - Beat in ricotta cheese until mixture is well combined and smooth.
05 - Add eggs one at a time, mixing thoroughly after each addition.
06 - Mix in lemon zest, lemon juice, and vanilla extract until fully incorporated.
07 - Gradually fold dry ingredients into wet mixture until just combined. Avoid overmixing.
08 - Pour batter into prepared pan and smooth the top surface evenly.
09 - Sprinkle sliced almonds evenly over batter. Optional: add 2 tablespoons sugar for crisp topping.
10 - Bake for 40-45 minutes until toothpick inserted in center comes out clean and top is golden.
11 - Let cake cool in pan for 15 minutes, then transfer to wire rack to cool completely before slicing.