I take as many tomatoes as I have and place them in a microwavable bowl - make a cut in each tomato and put a few sticks of celery and/or a couple of carrots with them. I also like to use a couple of lime leaves and a bay leaf.
Microwave on high for 25 minutes. Give them a stir and then cook again for 15 minutes.
Remove from the microwave and let cool. Season to taste with salt and pepper - and add a top of port - this makes all the difference! Do not add garlic - do this when you use the sauce or your puree will taste rancid.
Then liquidise! There you have it! Freezer and enjoy when there are no tomatoes in the garden.
I have also added chillies as well to make a chilli tomato sauce for pasta - wonderful!