Butternut Squash Soup

butternut squash (or other winter squash)

butter (unsalted)

leeks (white part only cleaned thoroughly and chopped (you could substitute one onion for the leeks if you prefer))

ginger (fresh peeled and minced)

chicken broth (homemade stock is easy and highly recommended)

heavy whipping cream

salt (if using salted store-bought chicken broth then taste the soup before adding any salt)

pistachios (chopped, and/or fresh sage (for garnish))