Spice up your veggie skewers with a Mexican twist. Use a mix of vegetables like bell peppers, red onions, zucchini, and corn on the cob. For the Mexican marinade, combine lime juice, chili powder, cumin, garlic, and olive oil. Let the vegetables marinate for at least 30 minutes, then thread them onto skewers and grill until they are slightly charred. Serve these Mexican veggie skewers with some fresh salsa, guacamole, and warm tortillas.