Ingredients
Method
- Heat olive oil in a large pot over medium heat. Add onion and a pinch of salt, and cook for 5 minutes until softened. Stir in garlic and cook for 30 seconds.
- Add carrots, celery, and bell pepper. Cook for 3 to 4 minutes. Pour in diced tomatoes and vegetable broth, plus red pepper flakes and black pepper. Bring to a boil, then reduce to a simmer.
- Simmer uncovered for 15 minutes, stirring occasionally. Add zucchini during the last 5 minutes. Taste and adjust salt and red pepper flakes.
- Ladle into bowls, top with yogurt and fresh herbs, and serve hot.
Notes
The soup will thicken slightly as it sits, so thin it with a little extra broth or water when reheating. For a milder version, use half the red pepper flakes and taste before adding more.
