Wash cabbage, onion, carrot, bell pepper, and tomato thoroughly, and cut them into bite-sized pieces.
Heat olive oil in a pot and sauté onion and garlic.
Add all the remaining vegetables and stir-fry for 2–3 minutes.
Pour in canned tomatoes and water, and bring to a boil.
Once it starts boiling, reduce to low heat and simmer for 30 minutes.
Season with salt and pepper.