Add fresh basil leaves, pine nuts, and roasted garlic in a food processor. Pulse it for a few seconds to completely chopped. (Scrape all sides of the food processor for a consistent result)

Pour the olive oil, grated parmesan cheese, salt, and pepper into the mixture until combined and emulsified. Add a little olive oil if the sauce is too thick or until you achieve the desired consistency.

Transfer the sauce to a bowl or an airtight jar. Use immediately or save for later.