Make pesto using a mortar and pestle:

1. Add garlic and a little salt to a mortar and pestle and crush into bits
2. Add chopped herbs and bash until they become wilted down, then add pine nuts, bash into a paste
3. Add olive oil and stir through, then add parmesan cheese and lemon zest, salt and pepper, stir through again with your pestle pounding and stirring until you get your desired consistency. Taste and season.

Make pesto using a food processor:

1. Add all the ingredients except for the olive oil in a food processor, blitz to combine.
2. While the processor is running, slowly add in the olive oil and blitz until you get your desired consistency. Scrape down the sides or add a little more oil if needed.