Don't bother with that fiddle Rocky.
Roast your tomatoes and make the soup, adding other ingredients as required. Then liquidise and press through a sieve. Simples!
I roast whatever veggies I've got (tomatoes, onion, pepper, courgette, etc) together with a little fennel and basil. Put into a pan with chicken stock and boil for about 20 minutes. Liquidise and press through a sieve, put back into the pan and season. I sometimes add a little chilli as well as some tiny pasta shapes. Heat back up.
Lovely.