Directions

1. Preheat the oven to 170C/340F/gas mark 3-4. Grease and line a 23cm round baking tin. Toast pistachios in the oven for 3 minutes until they have a greasy shine and a nutty aroma. Remove and set aside to cool.

2. Bash the cardamom pods using a pestle and mortar or whatever you can find, discard the husks, and grind the seeds until you get a fine powder.

3. Tip the pistachios and cardamom powder into a food processor and pulse until they're finely ground. Pour pistachios into a large bowl with the polenta and bicarbonate of soda and mix until evenly combined.

4. Place your butter and SkapEti olive oil into a small pan on a low heat until the butter has melted but not boiled. Leave to cool slightly.

5. In a second large bowl, whisk the eggs and sugar together until light, fluffy and thick enough to slowly fall off the whisk. Very slowly add the butter and oil, gently whisking it into the eggs until fully incorporated, then gently fold through the nut and polenta mixture. Zest the lemon, then halve and add the juice and zest to the mix. Stir to combine.

6. Bake for 45-50 minutes. Check that a skewer comes out clean and the surface springs back a little when you press in the centre. The cake will have risen with a golden top.

7. Rest in the tin until cool, and serve in thick slices with a dollop of cream. This cake is so moist that it actually improves the flavour to keep for a day or two. However, its vibrant green colour will start to fade.