Prepare Cake
Preheat oven to 175°C.
Beat eggs and sugar until pale and thick, about 5 minutes.
Add almond flour, lemon zest, and baking powder. Beat 30 seconds to 1 minute until just combined.
Transfer batter to pan. Top with sliced almonds.
Bake 30-35 minutes, or until toothpick comes out clean.
Cool completely.
