Preheat the oven to 350°F. Spray a rimmed baking sheet with nonstick cooking spray, or line it with parchment.
Place the halved tomatoes on the baking sheet.
Drizzle over the olive oil. Sprinkle over the sugar, and then the salt, and toss with your hands to combine. Arrange the tomatoes in a single layer cut side down.
Bake the tomatoes for about 40 to 45 minutes, until they are as cooked as you like them to be. Remove them with a spatula, take the skins off or not, and use them however you like.
Add a few springs of rosemary or thyme to the tomatoes as they are roasting. Or, add a few halved cloves of garlic. You could chop and use the leaves of the herbs or the garlic after the roasting process, and add them to whatever recipes you’re using the tomatoes in if you like.