Add butter and garlic to a pan and cook on low heat.
Add in mushrooms and cook for 6-8 minutes until mushrooms are soft.
Meanwhile, blend water and cashews on high speed for 1-2 minutes until very smooth.
Add tomato paste and sundried tomatoes to the mushrooms in your pan.
Stir in the cashew mixture and bring this to a simmer. Simmer for 3-5 minutes.
Stir. Add in salt and pepper to taste.
Pictured: Serve with white rice and top with chopped herbs