Melt butter in a large pan on medium heat and saute vegan chicken until it's browned on both sides. Remove from pan and set aside.
Add more butter if needed to saute the onion for 3 minutes on medium-low heat. Add garlic and saute 1 minute more. Pour in the wine and cook until reduced, about 4 minutes. Then add no-chicken broth, cashew cream, and fresh tarragon. Cover and simmer for 5 minutes.
Add vegan chicken back to the pan along with spinach and simmer 2 more minutes. Top with more tarragon and fresh parsley.
Serve with green beans and rice, or mashed potatoes if desired.