Cut cabbage, onion, carrot, celery, and tomato into bite-sized pieces.
Heat olive oil in a pot and sauté onion and garlic.
Add the rest of the vegetables and stir-fry for a little longer.
Add water, crushed tomatoes, and salt, and bring to a boil.
Simmer over medium-low heat for 20–30 minutes until the vegetables are tender.
Taste and adjust seasoning with salt and pepper as needed.