Cut cabbage, onion, bell pepper, celery, and carrot into bite-sized pieces.
Heat olive oil in a pot and sauté onion and celery.
Add carrot, bell pepper, and cabbage, and stir-fry together.
Add tomatoes (or canned tomatoes) and water.
Season with bay leaf, salt, and pepper, then bring to a boil.
Simmer until the vegetables are fully cooked.