Cook until vegetables are tender, about 20 minutes, stirring occasionally. Remove from heat, toss in parsley and cashews and keep covered for a few minutes to soften cashews.
4 Use immersion blender to puree soup until smooth. Season with more salt and pepper to taste.
Could work in batches to blend in food processor or blender if needed.
5 Serve with dollop of sour cream, microgreens, and/or sliced green onion.