Cover the cashews with hot water and soak for 20 minutes. Drain and rinse and transfer them to a powerful blender or food processor. (If using a Vitamix or another extra powerful blender you can skip the soaking )
Blend the cashews together with the water, lemon juice, garlic and sea salt until smooth and creamy.
Transfer the ricotta to a bowl, cover and refrigerate for a couple of hours until chilled and thick or serve right away. You can spoon over bruschetta or use in lasagna and for other pasta dishes. Keeps well in the fridge for about five days.