Preheat the oven to 350F and line an 8 inch springfoam pan with parchment paper (lightly oil the pan first with a little olive oil or butter)
In a medium mixing bowl, whisk the eggs and sugar together until combined and starting to lighten in colour and get a little airy in texture
Add the almond flour, lemon zest and cardamom and gently fold through to combine
Pour the mixture into the prepared cake tin and bake for about 30 minutes or until a tooth pick comes out clean (the cake should just be starting to turn golden on top)
Once ready, remove from the oven and leave on a cooling rack for about 10 minutes, then remove the outer ring of the cake tray and allow to cool completely
Add berries and sift a little powdered sugar on top if desired before serving