Add roughly chopped garlic, toasted pine nuts, and finely grated parmesan cheese to the bowl of a food processor and process until smooth. Add the fresh basil leaves and pulse until chopped.
While the processor is running, drizzle the olive oil through the shoot until the mixture is emulsified and smooth. Add the lemon juice, salt, and pepper, and whiz again.
Taste for seasoning and adjust to your liking.
