To make this classic, you need to ensure that your tomatoes are not undercooked or they won’t blend properly to create that smooth texture that is synonymous with tomato soup.
Roasting the tomatoes first will caramelize their sugars, add a smoky, sweet taste, and make them easier to break down and blend with your immersion blender.
It only takes about 30 minutes to roast the tomatoes. You’ll know they are ready when the skins are easily removable, and the fruit looks soft, shiny, and jammy.