Wash and dice onions, carrots, celery, and potatoes.
Add olive oil to a pot and sauté the onions and garlic.
Add carrots, celery, and potatoes and continue sautéing for 2-3 minutes.
Add tomatoes, cabbage, and bell peppers, and sauté again.
Pour in water and tomato sauce, then bring to a boil.
Season with bay leaves, salt, and pepper, then simmer over medium heat for 20-30 minutes.
Serve the finished soup in bowls.