Creating this divine Roasted Tomato Basil Soup can be done in just a few simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C).
2. Prepare Tomatoes: Place halved tomatoes, chopped onion, and peeled garlic cloves on a large baking sheet.
3. Drizzle Olive Oil: Drizzle olive oil over the vegetables. Sprinkle with salt, black pepper, and sugar if using.
4. Roast Vegetables: Roast in the oven for 25-30 minutes, or until the tomatoes are caramelized and the onions are tender.
5. Blend the Soup: Transfer the roasted vegetables to a blender. Add the vegetable broth and fresh basil leaves. Blend until smooth.
6. Heat the Soup: Pour the blended mixture into a pot and heat over medium heat. If desired, stir in the heavy cream for added richness.
7. Adjust Seasoning: Taste and adjust seasoning, adding more salt or pepper to your preference.
8. Serve Warm: Remove from heat and ladle the soup into bowls.

This straightforward process ensures you create a delicious and creamy soup with ease!