Cut cabbage, onion, bell pepper, carrot, and tomato into bite-sized pieces.
Add olive oil to a pot and sauté the onion.
When the onion turns translucent, add carrot, bell pepper, and cabbage, and continue to sauté.
Add tomato and water, and bring to a boil.
Add bay leaf, salt, and pepper, and simmer over medium heat for 20 minutes.
When all ingredients are cooked, remove the bay leaf and it's ready to serve.