I usually fast roast these because I don't have time/don't think to slow roast.

1 sprinkle sugar
1 tablespoon extra-virgin olive oil
1/2 teaspoon salt
1/2 teaspoon dried basil
1/2 teaspoon dried oregano
1/4 teaspoon freshly ground black pepper
4 pounds plum tomatoes, halved lengthwise (about 16 medium)
Cooking spray

1 sprinkle sugar 1 tablespoon extra-virgin olive oil 1/2 teaspoon salt 1/2 teaspoon dried basil 1/2 teaspoon dried oregano 1/4 teaspoon freshly ground black pepper 4 pounds plum tomatoes, halved lengthwise (about 16 medium)

How to SLOW roast:

Preheat oven to 200°.
Combine first 7 ingredients in a large bowl, tossing gently to coat. Arrange tomatoes, cut side up, on a baking sheet coated with cooking spray. Roast at 200° for 7 1/2 hours.

To FAST roast them- preheat oven to 400° and roast for ~ 1 hour.