Cut cabbage, onion, carrot, celery, and bell pepper into bite-sized pieces.
Heat olive oil in a pot and sauté the onion.
Add carrot, celery, and bell pepper, and stir-fry together.
Add cabbage and tomato, stir-fry.
Pour in water and tomato sauce, and bring to a boil.
Add seasonings such as salt and pepper, then simmer over medium-low heat for about 20 minutes.