Start by adding fresh basil leaves, pine nuts, garlic, salt, and lemon zest to the bowl of a food processor fitted with the blade attachment.
Pulse the ingredients until the basil leaves are finely chopped and all the ingredients are well combined.
Next, incorporate the two cheeses into the mixture and pulse again until everything is evenly distributed.
With the food processor running, slowly pour in the olive oil in a steady stream.
Continue to process until the sauce reaches a smooth and creamy consistency.
While the processor is running, slowly add the lemon juice.
Don't forget to taste the pesto and adjust the seasoning if needed, adding a bit more salt or lemon to suit your taste preferences.
Notes
Choose the Freshest Ingredients - Fresh basil, high-quality olive oil, and freshly grated cheeses make a noticeable difference in flavor. Avoid using pre-grated cheese or old basil leaves to ensure the best taste and texture.Add Olive Oil Slowly - When you are pouring the olive oil into the food processor, do it slowly in a steady stream. This helps emulsify the pesto, creating a smooth, creamy texture!