Cut cabbage, onion, bell pepper, tomato, celery, and carrot into bite-sized pieces.
Heat olive oil in a pot and sauté the onions.
Add the remaining vegetables and stir-fry for 3–5 minutes.
Pour in 600ml of water and canned tomatoes, then bring to a boil.
Season with bay leaves, salt, and pepper.
Simmer over medium-low heat for 20–30 minutes.