Core and slice the tomatoes into quarters. Then spread them on a baking sheet lined with parchment paper. Pour about 1/4 cup olive oil over the tomatoes and season with with salt and pepper.
Roast the tomatoes at 425 degrees Fahrenheit for about 20-25 minutes or until they are lightly charred.
In the meantime, add 1/4 cup olive oil and 2 Tbsp butter into a heavy-bottomed pot and bring it over medium heat. Then add in the chopped onion, carrots, and minced garlic.
Stir the vegetables for a few minutes or until cooked though and translucent. Then season with salt and pepper.
Add in the roasted tomatoes and blend thoroughly with an immersion blender.
Now pour in the chicken broth and bring it to a simmer.
Then add the heavy cream and chopped basil.
Bring to a simmer and blend once more. Serve and enjoy!