It's hard to imagine that you'd have too many tomatoes to know what to do with.  But, that time does come around once or twice in a season and here's a great way to use a bunch of tomatoes as a yummy side dish or try making a sauce out of them!

Small-ish tomatoes, halved lengthwise
salt
olive oil

Preheat oven to 300 degrees.  Oil a rack that will fit on top of a baking sheet.  Oil the baking sheet, too.  Place tomatoes cut side up on rack, sprinkle with salt and a few drops of oil.  Put in oven and roast for 2 hours.  Remove from oven, let cool for 1/2 hour then serve.  If you have leftovers, you can add them to soups or puree them into a flavorful sauce.