Well I still think that slow roasting  is a fantastic way to cook plum tomatoes.  They aren’t dried out like sun-dried tomatoes.  They are sweet and still a little plum and have an incredible flavor.
Slow Roasted Tomatoes

Plum tomatoes, halved lengthwise and seeded
French sea salt, pepper, olive oil

Toss tomatoes with oil, salt and pepper.  Line a rimmed baking sheet with parchment paper or foil.  Lay the tomatoes cut side up on the baking sheet.  Bake at 250 for 2 1/2 – 3 hours.   If you are in a hurry, you can set to Broil and it just takes 5-10 minutes, watch them carefully as they could burn using this rapid technique.

AN ALTERNATE VERSION OF FIRE-ROASTED TOMATOES ARE USED IN OUR GAZPACHO.