Gather all ingredients: fresh basil, Parmesan cheese, pine nuts, garlic, olive oil, and lemon juice. Rinse basil thoroughly and pat dry.

For an enhanced flavor, toast the pine nuts in a skillet over medium heat for about 3-4 minutes until golden brown.

Combine basil, toasted pine nuts, Parmesan, and garlic in a food processor. Add lemon juice.

Pulse the mixture, gradually adding olive oil until smooth, about 30-60 seconds. Adjust consistency with more olive oil if needed.

Taste the pesto and adjust seasonings like salt or lemon juice. Blend briefly to incorporate adjustments.

Transfer to an airtight container. Use immediately or store with a layer of olive oil on top to prevent browning.