In a stock pot, melt butter. Saute onion and celery for 5-7 minutes, until tender.
Whisk in flour and cook for 1 minute on medium heat. Stir in vegetable broth and cook until thickened.
Season with herbs, salt and pepper.
Add in potato and butternut squash. Cook on a low boil for 20 minutes.
Add in kale and cook for 2 minutes until wilted. Reduce to low.
Stir in half and half. Heat through, but do not boil. Season with additional salt and pepper.