Prepare the tomatoes, onion, carrot, celery, and garlic.
Heat olive oil in a pot and sauté the garlic and onion.
Add the carrot and celery and sauté together.
Add the tomatoes and bring to a boil.
Add water and herbs (such as basil and oregano) and simmer for 15 minutes.
When the ingredients are cooked, blend smoothly with a hand blender.
Season with salt and pepper.