Place cashews in a bowl. Fill with water until the cashews are just covered. Let soak for at least 4 hours so that the cashews are soft. Drain the cashews. Place drained cashews in a food processor or blender. Add the tahini, lemon juice, garlic, cumin, salt. Blend until smooth-ish. Now, add 1/4 cup of water at a time and blend until the hummus reaches a hummus-like consistency. I ended up using 1/2 cup of water...but it really depends on how juicy your lemons are. you may need more or less than that. Serve with freshly cut veggies for dipping. Enjoy!