Preheat the grill to medium-high heat.
Wash and prepare all the vegetables by slicing them into uniform pieces.
In a large bowl, toss the vegetables with olive oil, salt, and pepper.
Allow the vegetables to marinate for about 10 minutes.
Place the vegetables in a grill basket or directly on the grill grates.
Grill the vegetables for 5-7 minutes on each side, until they are tender and have grill marks.
Use tongs to flip the vegetables halfway through grilling.
Remove the vegetables from the grill and let them cool slightly.
Optionally, sprinkle fresh herbs over the grilled vegetables for added flavor.
Serve warm or at room temperature.