- Preheat oven to 425ºF. Spread sweet potatoes and bell peppers on baking sheet. Drizzle with olive oil and rice vinegar. Gently toss with hands to coat. Roast for 20 minutes. Carefully remove pan from oven and stir in garlic cloves. Return to oven for 20 minutes longer or until edges of vegetables are lightly charred.
- Transfer vegetables and garlic to a large pot or Dutch oven and add vegetable stock, thyme and sea salt. Use an immersion blender to purée until smooth. Heat pot on stove over medium heat for 8-10 minutes, until bubbling. Stir well.
- Ladle soup into bowls and serve hot topped with crème fraiche, parsley, toasted bread and black pepper.