Cut vegetables such as onion, celery, carrot, and cabbage into bite-sized pieces.
Heat olive oil in a pot and sauté the onion, celery, and carrot.
Add the rest of the vegetables like cabbage and bell pepper and stir-fry briefly.
Add tomatoes (chopped or canned) and water.
Season with salt and pepper, and simmer over medium heat.
Cook for 20-30 minutes until the vegetables are tender.