Cut cabbage, onion, bell pepper, and carrot into bite-sized pieces.
Add olive oil to a pot and sauté the onions.
Add cabbage, bell pepper, and carrots, and stir-fry together.
Chop the tomatoes and add them, then sprinkle a little salt.
Pour in enough water to cover the ingredients and bring to a boil.
Season with bay leaf and black pepper.
Cook until all the vegetables are tender.
Add lemon juice to taste if desired.