Combine cashews and boiling water in a medium bowl then let sit about 15 minutes or until cashews are starting to soften.
After the 15 minutes, combine cashews and water from the bowl in step one along with nutritional yeast, dijon, garlic, salt and pepper in a high-speed blender then pulse until extra smooth.
Sauteed Shallots & Mushrooms:
Heat olive oil in a large skillet over medium heat. Once oil is hot, add the sliced shallots, with a bit of salt and pepper. Saute until fragrant and softened, about 2-3 minutes.