Directions
Combine the basil, parsley, garlic, pistachios, sea salt, black pepper, and lemon juice in the bowl of a food processor or high-powered blender. Pulse several times until the are finely chopped and form a coarse paste.
With the motor running on low, slowly stream in the olive oil until the pesto is smooth and emulsified.
Check the consistency. If it's too thick for your liking, add the water, 1 tablespoon (15 ml / 0.5 fl oz) at a time, with the motor running, until you reach your desired texture.
Taste and adjust seasoning if necessary.
Transfer to an airtight container and store in the refrigerator for up to 2 weeks.