Make ahead note:
The pesto can be made 2-3 days ahead. Make the pesto using only 50ml olive oil and transfer to jam jar or airtight container. Carefully pour the remaining oil over the top so that the surface of pesto is completely covered with oil. Store in fridge. Leave to stand at room temperature about 30 minutes before stirring and using.
Freexe note:
The pesto can be frozen for up to 3 months in airtight container. Make the pesto and cover with a layer of oil, as above. Defrost for 2-3 hours at room temperature and stir before using.
Recipe from Nigella Kitchen by Nigella Lawson, published by Chatto & Windus, part of the Random House Group Ltd.
www.nigella.com
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The texture of this was quite wierd but very tasty - check it out http://muppyat.blogspot.com/2011/01/nigellas-pasta-alla-genovese.html