Roasted Rutabaga and Squash Soup

Preheat the oven to 375 degrees F (190 degrees C).

Combine rutabaga, butternut squash, sweet potato, garlic cloves, herbes de Provence, salt, and pepper in a large baking dish. Drizzle with olive oil and toss to coat.

Bake in the preheated oven until fork-tender, about 60 minutes. Transfer to a large soup pot.

Add milk and butter to the soup pot and heat over medium heat until milk is heated, 5 to 10 minutes. Puree soup with an immersion blender until smooth and uniform in consistency. Heat, without boiling, before serving.