Soak cashews in hot water for 10 minutes. Drain and discard liquid.
Combine all ingredients (besides herbs) in food processor. Blend until creamy and smooth, scraping down sides as needed. Add more water if it's too thick.
Add in roughly chopped herbs and pulse until fully combined.
Notes
Store in air-tight container for up to 10 days in the fridge. Can also be frozen for up to one month.