Preheat your oven to 425 degrees Fahrenheit.
Slice the tomatoes in half.
Chop the onion into chunks, and peel the garlic cloves.
Place the tomatoes, onion, and garlic on a baking tray.
Drizzle with olive oil.
Sprinkle with salt, pepper, sugar, and thyme.
Roast the vegetables in the oven for 20-25 minutes until caramelized.
This brings out the sweet, rich flavors.
Once roasted, transfer everything to a blender.
Add the vegetable stock, then blend until smooth and velvety.
Pour the blended mixture into a pot.
Stir in the cream over low heat until warm.
Serve your soup hot.