01 - Preheat oven to 350°F. Grease and line an 8-inch round cake pan with parchment paper.
02 - In a medium bowl, whisk together ground almonds, flour, baking powder, and salt. Set aside.
03 - In a large bowl, beat softened butter and granulated sugar using an electric mixer until light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time to the butter mixture, blending thoroughly after each addition.
05 - Mix in orange zest, orange juice, grated ginger, and vanilla extract until evenly combined.
06 - Gently fold the dry mixture into the wet ingredients until just combined, avoiding overmixing.
07 - Pour batter into the prepared pan, smoothing the surface. Optionally, sprinkle sliced almonds evenly on top.
08 - Bake for 35 to 40 minutes until a skewer inserted in the center comes out clean and the cake surface is golden.
09 - Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
10 - Dust the cooled cake with powdered sugar and decorate with orange zest strips if desired.