Posted: 23/04/2013 at 08:06
Yes I do them in the oven on about 130, not too sure how long for though I'm afraid - until they look good.Here's what I do (adopted from my Brazilian housemate years ago):
Cut the tomatoes in half, place on very well olive oiled tray and sprinkle with salt, sugar and oregano (dried fine). Cook for at least an hour. If they are browning at all turn the oven down.
Once done, store in a jar with olive oil, including the oil from the tray.
I don't know how long they keep as they never make it into the jar in my household.