Combine all marinade ingredients in a medium-sized bowl; stir to combine.
Place vegetables into the marinade; stirring occasionally, for at least 2 hours.
Arrange marinated vegetables on skewers in any imaginative sequence.
Grill on BBQ or under a grill; basting with leftover marinade and turning every few minutes.
The cooking time is not exact; they need to be watched carefully and removed from the heat until the vegetables are tender and browned.
Try including chunks of zucchini to the vegetable mix for variety.