Add anchovies, lemon juice, and garlic to a food processor and pulse 2–3 times
With the machine running, slowly stream in the olive oil, followed by the water
Taste and adjust seasoning if needed
Store in an airtight container in the fridge for up to 3 days
Notes
Storage: Keep in an airtight jar in the fridge for up to 3 days. The oil and lemon juice will separate a bit as it sits, so give it a good shake before using.