around 1/2-1 cup walnuts or pine nutswalnuts give a more bitter pesto, but I like it
about 1/2 a cup of freshly and finely grated parmesan
the juice of 1 lemon
generous salt
enough olive oil to make a pesto consistency
Instructions
Combine all ingredients in your food processor, and mix until a pesto consistency has formed. Store in an airtight container in the fridge, with a thin layer of olive oil on top. This will stop it from oxidising.