Cut cabbage, carrot, onion, tomato, and bell pepper into bite-sized pieces.
Heat olive oil in a pot and sauté the onion first.
Add carrot, bell pepper, and cabbage, and stir-fry together.
Add tomato and water, and bring to a boil.
Season with bay leaf, salt, and pepper.
Boil for 20 minutes until the vegetables are cooked through.