Preheat the oven to 200C.
Add the sweet potato, red peppers, onion and whole garlic cloves to a baking sheet. Toss with the olive oil and spices to coat and spread out to an even layer. Roast in the oven for about 30 min or until fork tender.
Add the roasted veggies to a large pot with the vegetable broth, stir well and bring to a simmer for about 10 min.
Turn the heat off and blend the soup until smooth with a hand held bender. Taste and add more salt and pepper is needed.
