Preheat oven to 400 degrees and line a large sheet pan with foil or parchment paper.
Place carrots, onions, garlic, tomatoes, and red peppers on sheet. Drizzle olive oil and toss to coat. Roast vegetables for about 25 minutes, or until tender.
After roasting, add vegetables to a pot and squeeze garlic from the skin. Also add in the can of stewed tomatoes. Add in veggie broth and seasonings. Use an immersion blender and blend until smooth.
If you want a smoother soup, pour through a mesh sive to eliminate the larger pieces. Do this in batches.
Bring soup to a simmer. Add sugar and salt.
Serve with a spoonful of warm cream, or you can add the cream into the pot. Top with a little Parmesan, herbs, and toasty bread.
Notes
When roasting the vegetables, little prep is needed. Keep the onions and garlic in the skin, half the peppers and tomatoes, and no need to cut the carrots.
Salt will be needed but use at your own discretion.