Heat the olive oil in a large pot over medium heat. Add the garlic, red pepper flakes, and oregano and cook for 1 minute.
Add the vegetable broth, crushed tomatoes, white wine, sugar, salt, and pepper. Bring the mixture to a boil, then reduce the heat and simmer for 15 minutes.
Remove the soup from the heat and let cool for 5 minutes. Puree the soup in a blender or food processor until smooth.
Return the soup to the pot and reheat over medium-low heat. Add the scallops, avocado, and basil and cook for 2 minutes.
Serve the soup warm or chilled.
Interesting Facts
This chilled tomato soup is a great way to enjoy the flavors of summer.
The seared scallops add a nice seafood flavor to the soup.
The avocado provides a creamy texture and a hint of sweetness.