2Stir carrots, potatoes, onion, and garlic together in a large roasting pan; drizzle with oil and sprinkle with herbes de Provence, salt, and pepper.
3Roast in the preheated oven until vegetables are tender and beginning to brown, stirring once, about 50 minutes. Remove roasted vegetables from oven; scrape vegetables and any brown bits into a large pot. Pour vegetable broth into vegetable mixture; bring to a boil.
4Blend soup until smooth with a stick blender; stir in cream to thin soup to desired consistency.
Footnotes
Cook's Notes:
Milk can be substituted for light cream.
If you want to freeze the soup, freeze before adding milk.