Greek-style vegetable skewers are a delightful combination of fresh vegetables and Mediterranean flavors. Start by marinating chunks of eggplant, zucchini, cherry tomatoes, and red onions in a mixture of olive oil, lemon juice, minced garlic, dried oregano, and black pepper. Let the vegetables marinate for at least 30 minutes. Thread the marinated vegetables onto skewers, alternating with chunks of feta cheese and Kalamata olives. Grill the skewers over medium heat for about 5-7 minutes, turning once, until the vegetables are tender and slightly charred. Serve the skewers with a side of tzatziki sauce and warm pita bread for a taste of Greece.