Cheesy Cauliflower and Potato Bake

Name: Cheesy Cauliflower and Potato Bake
Ingredients: 2 large russet potatoes, 1 pound, peeled and cut into 1/2-inch dice; 1 small head cauliflower, cut into small florets (4 heaped cups); 1/4 cup raw cashews, soaked 4 to 6 hours; 1 cup unsweetened almond milk; 3 tablespoons tapioca starch; 1 tablespoon mellow white miso; 1 teaspoon smoked paprika; 1 small garlic clove, minced; 1 teaspoon sea salt, or to taste; 1 teaspoon onion powder; 1 tablespoon apple cider vinegar; 2 tablespoons tomato paste; 1 tablespoon dry sherry, optional; 1/2 teaspoon ground mustard powder; 3 tablespoons nutritional yeast; Dash of cayenne