Combine all the vegetables in a large resealable plastic bag.
In a small bowl, whisk together the balsamic vinegar, olive oil, salt, pepper, and garlic. Pour over the vegetables. Press out as much air as possible and seal. Marinate for 30 minutes.
Preheat your grill to medium-high heat. Pour the vegetables into a grill basket or wok. Grill for about 14 minutes, stirring/shaking occasionally until the vegetables are cooked and slightly charred on the outside.
Notes
Mix up the veggies - you can't go wrong with this recipe!