Preheat the oven to 180C, Fan 160C, Gas Mark 5
Line a 20cm cake tin with baking parchment and grease.
Put the margarine, caster sugar, eggs, orange zest, ground almond and flour into a bowl and whisk until creamy.
Fold in the raspberries.
Add to the cake tin and level gently.
Scatter the flaked almonds on the top
Bake for 45-50 minutes until a skewer comes out clean
Leave to cool in the tin for twenty minutes before removing.
Dust with icing sugar to serve.