Tomato Soup with Rosemary

You will need the following : 1 med onion, chopped 2 stalks of celery, chopped 1 carrot, diced 1 clove of garlic, crushed 400g tin plum tomatoes, chopped 1 sprig fresh rosemary Juice of 1 lemon 1 litre of vegetable stock or bullion powder to 1 litre of water 50g spinach, chopped 1 head of…