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> **Possible Duplicate:**  
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> [What is a good pine nut substitute for pesto?](https://cooking.stackexchange.com/questions/13336/what-is-a-good-pine-nut-substitute-for-pesto) 
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Pine nuts are very expensive here. I'm wondering if I can substitute any of the following:

* Walnuts
* Sunflower seeds
* Almonds

Would any of these be appropriate in a pesto sauce?