To soak the cashews, cover them with water and soak for at least 2 hours, up to overnight. Then drain the soaking water.
Drain the water from the tub of tofu. There's no need to press the tofu.
Combine soaked cashews, tofu, water, lemon juice, yeast flakes, garlic, and salt in a blender or food processor. Pulse several seconds to combine. Use a spatula to push down ingredients from the side of the bowl. Add water, one tablespoon at a time, until a spreadable consistency is achieved. It should take no more than 1/4 cup of water.
Storage: You can store this in the fridge for 3–5 days, or freeze for up to 1 month to use in lasagna.
Notes
The nutritional estimate is provided for each cup of the ricotta.