I do my tomatoes on a non-stick foil lined sheet pan on our gas grill outside
I use the indirect method and when they are almost done, I turn of the gas, keep the hood down and let them finish is the residual heat. They seem to dry better, yet retain some moisture that way. I make tomato sauce out of most of them, even paste if I have enough of the paste tomatoes. Otherwise I eat them like candy, they are so yummy.