A vegetarian soup simmered with cabbage, carrot, celery, onion, and tomato.
Slice cabbage and onion into bite-sized pieces.
Heat olive oil in a pot and sauté the onion.
When the onion turns translucent, add the cabbage and sauté together.
Pour in water and bring to a boil.
Season with salt and pepper, then simmer for about 10 more minutes.