Soak cashews overnight, or in hot water for an hour.
Drain cashews, place in blender with nutritional yeast, horseradish, lemon juice, turmeric, garlic powder, salt and pepper, and 1/4 cup of water.
Blend until smoothly, adding rest of water in slowly if needed. You may not need the full 1/2 cup depending on consistency. It should be thick-ish like a spread, and not too runny.
Taste and add more horseradish if there isn’t enough of a kick for your spice level.
To serve, spread onto toast or use in sandwich creations!