How to Make It
Preheat grill to medium-high (about 450°F), or heat a grill pan over medium-high. Toss together tomatoes, 1 tablespoon of the oil, salt, and black pepper in a medium bowl; set aside.
Grill tomatoes, turning often, until charred and softened, 4 to 6 minutes. Remove from grill, and let cool until ready to use.
Coarsely chop tomatoes, and transfer to a medium bowl. Add parsley, vinegar, garlic, sugar, crushed red pepper, and remaining 1 tablespoon olive oil. Toss to combine.