Cut and chop the vegetables and put them in a large bowl.
In a small bowl, combine the balsamic vinegar, soy sauce, olive oil, brown sugar, fresh herbs and salt, and stir until combined. Pour over vegetables and stir to coat vegetables.
Cover vegetables and let them sit on the counter to marinate an hour, or cover and let marinate in the refrigerator overnight.
Light your grill to high, using a slotted spoon, transfer vegetables from the bowl to a grill pan. Cook over medium-high heat, stirring occasionally for 15-20 minutes, until vegetables are tender. Remove from grill, transfer into a bowl and serve.