Clean and wash the Brussels sprouts and cut them into a cross shape. Wash and clean the broccoli and cut into florets. Peel, wash and slice the carrots. Wash, clean and slice the celery.
Clean, wash and cut the peppers into pieces. Peel and roughly dice the onion. Heat olive oil in a pot, fry the onions well. Add prepared vegetables, 1.5 litres of water and strained tomatoes.
Stir in broth. Cover and let simmer for 25-30 minutes at low heat. Cook rice in boiling salted water for about 25 minutes. Drain, drain and add to the soup. Season to taste with salt and pepper.