Optional: toast your pecans in a heavy bottomed pan over medium heat for 3-4 minutes. Stir regularly to ensure that they don't burn.
Add all ingredients, except olive oil, to a food processor and blend until roughly chopped.
Scrape down the sides of the food processor and add in the olive oil. Continue to blend until you reach your desired level of smoothness.
*If you are not familiar with nutritional yeast, it is a plant-based ingredient that adds a cheesy/umami flavour. It is NOT the same yeast that you use in bread. Check it out here.