Place the raw cashews in a bowl and cover them with 2 inches of water. Leave on the counter to soak overnight. Strain and pat dry.
Steam the cauliflower for 5 to 8 minutes, until tender when poked with a fork.
Add all ingredients for the dip to a blender or food processor. Start with 3/4 cup cashew milk and use up to 1 cup if necessary. Note: adjusting the amount of nut milk determines the thickness of the queso. For a very thick queso, use ½ cup nut milk.
Blend until completely smooth and no clumps are visible.
Taste dip for flavor add additional green onion and/or sea salt to taste.
Notes
*Adjust amount of cashew milk based on desired consistency of dip. For thinner dip, use 1 cup of cashew milk. Substitute unsweetened almond milk for cashew milk.