Parmesan Tomato Soup is the perfect light soup that the perfect weeknight meal. It's easy to make and it's delicious! The best part about this soup is that you can make it in your Instant Pot.. You'll be able to enjoy this soup all year round, too!
Add tomatoes, celery, carrots, chicken broth, onions, oregano, basil, and bay leaf to the pressure cooker. Cook on high for 15 minutes.
While the soup cooks place your butter and flour in a skillet over low heat. Constantly stir with a whisk for 5-7 minutes. Slowly stir in 1 cup hot soup. Add another 3 cups and stir until smooth. Add all back to the slow cooker. Remove the bay leaf.
Blend the soup with your blender or Immersion blender until smooth.