Toast the cashews in a small, dry sauté pan over medium heat until fragrant and lightly browned.
Place all of the ingredients, except the oil, in a food processor. Pulse to combine.
Slowly incorporate the oil while the machine is running, until a smooth paste-like consistency forms. Continue blending to thin the sauce to your preference.
Serve over meat, stirred into spaghetti squash, or mixed with scrambled eggs. Store leftovers in an airtight container in the refrigerator.