<human>:  How do I make a Mediterranean chicken soup?
<bot>: To make Mediterranean chicken soup, start by heating a large pot over medium-high heat and adding a tablespoon of olive oil. Once the oil is heated, add chopped onions, garlic, carrots, celery, and cooked chicken and cook until the vegetables start to soften, about 5 minutes. Add tomato paste, oregano, thyme, and salt and pepper to the pot and stir to combine. Pour in chicken broth and bring to a boil. Reduce the heat and let the soup simmer for about 20 minutes or until the vegetables are tender. Finally, stir in chopped fresh spinach before serving.