Balsamic glazed veggie skewers are a sweet and tangy option for a vegetarian barbecue. Chop a variety of vegetables such as bell peppers, red onions, cherry tomatoes, and zucchini into bite-sized pieces. In a small bowl, whisk together balsamic vinegar, honey, Dijon mustard, minced garlic, salt, and pepper. Toss the vegetables in the glaze until well coated. Thread the vegetables onto skewers and grill over medium-high heat for about 10-15 minutes, turning occasionally, until they are tender and slightly charred. Serve the skewers as a side dish or as a main course with a side of couscous or quinoa.