Place the cashews, mustard, nutritional yeast, coconut oil, maple syrup, and salt into the bowl of a food processor. Blend until smooth, stopping to scrape down the sides of the bowl as needed.
Taste-test the mixture and make any adjustments to suit your taste.
Transfer the mixture to a sheet of plastic wrap. Gently wrap plastic around the mixture and press it into a ball shape*. Refrigerate for at least 4 hours.
Gently peel away the plastic wrap and transfer the ball to a plate. Press pecan pieces into the surface, reshaping gently as needed.
*It will be too soft to get it perfectly round at this point. Don't worry about that! You can adjust the shape later.