Place all ingredients in a saucepan. Bring to a boil, then reduce to a simmer. Cook for about 5 minutes.
Top with herbed croutons and serve.
Notes
This soup will last up to 5 days in an airtight container in the fridge.To freeze it, make sure to let the soup cool completely before placing it in a freezer bag or air-tight container.Liquids expand as they freeze, so don't fill containers or bags all the way full. For freezer-safe containers, leave about an inch of space from the top. For freezer bags, fill about ¾ the way full. Let out as much air as you can, and lay flat in the freezer.You can keep soup in the freezer for 4-6 months, but flavors in the freezer start to fade around 2 months.When you're ready to eat, let the soup thaw overnight in the fridge, then heat in a saucepan or microwave.