Place the halved tomatoes in a large mixing bowl and sprinkle with sugar, salt, pepper, parsley, basil, and thyme. Add the oil, vinegar, and garlic.
Toss well and then allow the tomatoes to marinate at room temperature or in the refrigerator for a few hours. The tomatoes will create their own amazing marinade as they rest.
Notes
I've used campari, cherry, grape, and sunburst tomatoes with success. This recipe will work nicely with whatever tomatoes you happen to have on hand.