Ingredients:
- 3 onions, chopped into chunks
- 2 green peppers, chopped into chunks
- 1 bunch of celery, chopped into chunks
- 1 iceberg lettuce, chopped into chunks
- 2 x 400g tins chopped tomatoes
- 800 ml/1½ pints vegetable stock
- 300 g/10½oz lentils or soup mix
- Sea salt and freshly ground pepper