In a medium pot, heat 1 Tablespoon of olive oil over medium heat.
Sauté onions, carrots, and celery for 10 minutes.
Add rosemary, parsley, bay leaf and stir well.
Add the bread slices and stir again.
Add canned tomatoes with juice, water and salt, stir well, and bring to a boil.
Allow to simmer for about 25 minutes, or until carrots are fork tender.
Remove from heat. Remove the bay leaf and the sprig of rosemary (leaves will have fallen off).
Using an immersion blender, or carefully transferring to a regular blender, blend until smooth.
Serve with croutons (below). Large loaf of bread cubed. Toss with olive oil and half teaspoon salt. Cook in pan for 10 minutes until crispy and brown.